Reddit mentions of Nature's Way NutraVege Extra-Strength Omega-3 Plant Based Liquid Supplement- Vegeterian, Vegan- Cranberry Orange Flavor, 6.8 oz

Disclaimer: I am only speaking from my experiences and what has worked for me.

So, I know this is going to sound strange, but you don't actually need as much protein as normally recommended for weightlifting on a vegan diet. Don't get me wrong, protein is vital for proper athletic performance; but the 1 gram protein per pound of bodyweight has largely been debunked, it's closer to .8-.9 grams protein per kilogram body mass. That being said, the best sources of protein are legumes, with my personal favorite being tempeh; which is fermented soybeans. It has a nice crunch, a slightly nutty flavor, and it's easy to digest. Here is a list of all the best foods to help ease your transition:

• Vivo Life Protein Powder (If you want to make sure you hit your protein macros. It's the brand that sponsors the vegan YouTubers. I think it tastes better than whey protein personally).
  
• Legumes (beans and lentils of all colors. I like kidney beans and hummus. Lentils are probably better for you specifically because they have slightly less environmental impact than beans)
  
• Veggies (avocados are fairly calorie-dense, although technically they are berries, and you can't forget the cruciferous)
  
• Leafy greens (make sure to cook spinach thoroughly to help remove the oxalates)
  
• Fruits
  
• Grains (oats, rice, Ezeikill bread is awesome, made from sprouted grains, and is perfect for avocado toast)
  
• starchy veggies (sweet potatoes are a must. if you can, try to find the okinanwan (sometimes Hawaiian) purple kind.)
  
• Don't forget seaweed for iodine if not using iodized salt.
  
• nuts and seeds (flaxseed and hemp seed go very good in oatmeal, also great for calories)
  
• supplement D3 (if you don't get a lot of sun), B-12 (I like this liquid one on amazon), and Omega-3 (Here's a good one that's cranberry and orange-flavored).
  
  The supplements aren't wholly necessary in the beginning, especially if you're still drinking cow's milk and eating fish. But they will be if you want to transition to vegan long term.
  
  Here are few vegan bodybuilders I like:
  
  Simnett Nutrition: Awesome mostly calisthenics guy who does a lot of cooking/nutrition videos.
  
  Nimai Delgado: More of a classic bodybuilder channel. Some days of eating, some training, some travel vlogs, etc. His physique is absurd tho.
  
  Vegan Physique: This is the guy where I learned that protein isn't all that difficult to get on a vegan diet. He also has some good meal preps.
  
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  Hope this helps! Welcome to veganism! :D