Reddit mentions of TONOR PC Microphone USB Computer Condenser Studio Mic Plug & Play with Tripod Stand for Chatting/Skype/Facetime/YouTube/Recording/Singing/Gaming/Podcasting for iMac PC Laptop Desktop Windows Computer

For software, audacity is free and very widely used.

For a mic, I personally use an SM58 going into a usb interface. But that’s not super cheap to start off. This may serve your needs though, based on a quick google lookup; https://www.amazon.com/dp/B01142EPO4/ref=cm_sw_r_sms_c_api_DQP8BbCK7KX90.

First of all, there's no "right voice" for yandere content. For example, my yandere GWA posts have been relatively well received and I'm basically a tenor. It's more in how you use it than how your voice sounds. Do you sing at all? If so, going into head voice might help if you want your voice to be higher. If you don't know how, I'll explain it, but it's hard to explain so I don't want to if you already know.

Do you have a better microphone? This was extremely muffled. I'd have to know what you were recording on to give any specific ways to make it better, but if you don't have a modern phone or webcam, investing in a microphone would be wise. If you have money to spend, the Yeti Snowball is a wonderful microphone, but you can do great things on a cheaper microphone like this one. I record my audios on an iPhone X and that works beautifully.

That said, what kind of content were you thinking of making? If you're making primarily sound based content, you'll definitely want to learn to use Audacity. It's pretty intuitive, but don't be afraid to google if you can't figure it out (you can also PM me, I'm always happy to help). To get rid of the muffling in your audio, try using the equalizer tool to get rid of frequencies that are too high. You may also want to do some noise reduction.

I hope this helps! Sorry I couldn't give more specific feedback, I just need to know if you're making a recording mistake that causes that audio weirdness first. Try recording in a small room with carpet if you have one. Again, feel free to PM me with any other questions!

https://www.amazon.com/gp/product/B01142EPO4/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1

Usually on sound. Get good stereo regular headphones they about always sound better then gaming one. So your jbl ones might not be that bad as you think!
There are cheap mic options that usually sound better then cheap headphone ones. I use https://www.amazon.com/gp/aw/d/B01142EPO4/ref=cm_cr_arp_mb_bdcrb_top?ie=UTF8
as backup and it sounds great.

Surround headphones suck and actually make it harder to spot sound direction for shooters in allot of games.

So to give you an extra option 😉

Depending on your budget/patience and if you want to use a desktop mic . Maybe you can stick to the jbl ones for a while. Get mouse, keyboard and that mic now. I just go by logitech on kb/mouse every time.
My logitech g110 keyboard is 10y old and is still perfect. I play wow so its buttons get hammerd hard and allot. Id say get both from logitech according to your likings/grip... and budget.

Then later on get a pair of sennheisers you like.
They have great headphones at all priceranges, even cheaper ones will sound better then quite more expensive gaming tagged ones. They will be great for gaming and music while traveling or at home. Getting you 2 in 1 go. If u get a bluetooth pair and look at specs . You should be able to connect to pc with usb and audio jack. It always sounds better that way. Or bt! They wont be that cheap as wired. For wired the hd range is nice. You can buy see all on there website. Should be able to use them as backup mic since most have that 2 at ok quality for phonecalls these days i guess.

If you want a good dirt cheap Mic I'd recommend the Tonor Condenser Mic. I use it & it's great quality for less than $15 on Amazon. I'd recommend getting a Boom Arm as well because you will need to be very close to the Mic for the Condenser to kick in.

https://www.amazon.com/Tonor-Professional-Condenser-Microphone-Computer/dp/B01142EPO4/ref=sr_1_2?s=electronics&ie=UTF8&qid=1506270873&sr=1-2&keywords=tonor+usb+mic

Heres what I use for streaming.

Camera : logitech c920 https://www.amazon.com/Logitech-Widescreen-Calling-Recording-Desktop/dp/B006JH8T3S/ref=sr_1_1?ie=UTF8&qid=1491446015&sr=8-1&keywords=C920


And mic: https://www.amazon.com/gp/product/B01142EPO4/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Both are wonderful. :) I recommend if you get this mic that you use a sponge cover for it.

You can even use the built in mic in a laptop or a $5 USB webcam/mic. May have to get exploratory with placement in the room, but you'll end up with an original product if done correctly.

For super cheap, you might could try something like this: https://www.amazon.com/TONOR-Condenser-Microphone-Podcast-Computer/dp/B01142EPO4/ref=sr_1_10?ie=UTF8&qid=1522949422&sr=8-10&keywords=usb%2Bmic&th=1

I’ve got the c922 and it’s not the greatest mic in the world, especially if you sit more than 2 feet from it (like a normal desk with a chair) I’d recommend at the very least some kind of cheap desk mic. There’s plenty of sub-$20 USB microphones on amazon that would be a better start imo

Edit - quick prelim search comes up with https://www.amazon.com/dp/B01142EPO4/ref=cm_sw_r_cp_api_1bLbAbE37G6QV

Which has some good reviews