Reddit mentions of Sagler mortar and pestle set Marble Grey 3.75 inches diameter

It will likely be either too potent or too weak, there's variance so it's best to grind them up into a uniform powder so the variance is equalized. Grab a cheap mortar and pestle off amazon I got mine for just 10 bucks, looking right now it's no longer available but skimming through something like this would work just fine https://www.amazon.com/gp/product/B01M742974/ .

After grinding them up you can measure the powder if you want but if you don't want to buy a scale then using a 1/8th teaspoon measuring spoon is normally what I use which when full for me measures in around 0.2g.

I'd highly recommend buying a scale though, I use this one https://www.amazon.com/gp/product/B000O37TDO/ which is only 8 bucks. The supplies to properly microdose are cheap if you try to find good deals. Do it right so you don't regret it!

I know exactly what you mean with the taste, I usually can't even hold the abv down if I taste it. So I would recommend you make cannacaps. You'll still get gross abv burps and farts but they won't be as bad.

First step would be to get your abv to a fine grind, basically powdered. It's not super important, but it makes a difference in a couple different ways, and mortar and pestle sets can be pretty cheap. Hell you could probably even makes one that gets the job done. If you do grind your abv further, that's gonna be the smelliest part of this process, so I'd recommend you prep your room better than you would just for vaping.

The next step would normally be to water cure but since you're in a dorm that's likely not an option due to both smell and access to equipment. I have another method you can use to cure your abv with a pressure cooker that doesn't require an oven, if you're interested I can write that out for you, but I'd imagine smell would still be an issue.

Once your abv is ready, you can start to cap them. 00 sized caps work best IMO, they're pretty big so they hold a lot of abv. You could totally fill them up one by one, but if you can I'd recommend grabbing a capsule machine so you can fill a large number of capsules (the one I linked does 100 at a time) in like 10 minutes. The machine also does a super good job at getting as much abv as possible into each cap, which is part of why a super fine grind is important. Oh and if you do go for the machine, MAKE SURE you get one that matches the size of caps you have, I made that mistake once.

Regarding coconut oil, I don't usually use it but I've heard really good things about it maximizing THC absorption. I don't believe you can easily infuse your abv with oil without a kitchen/smell, but if you wanted to you could put a bit in the caps with the abv.

And there you go, simple cannacaps! I'd recommend you have a large fatty meal with or soon after taking the caps to maximize absorption. I'd also like to note that IME abv cannacaps fuse is even more unpredictable than just eating it, I've had it take like 4 or 5 hours to hit with caps.