@oliver23 First off, you just need to eat more in general. You're incredibly thin, especially for (I assume) a man. You can eat tons of protein but if you don't just eat more calories, you aren't going to make much progress.
Do you not like meat? Usually the fussy eaters at least like chicken! Regardless, for your overall benefit in life.... start trying more foods cooked in different ways and work through your fussy eater status. You don't need to like
every food, but nothing is more embarrassing than being with someone who acts like a toddler when it comes to food. You need to be able to eat a healthy, rounded diet that consists of majority whole foods (meat, veg, fruits, eggs, grains, etc) and avoid ultra processed foods (aka, anything coming pre-packaged/ready to eat like bread, pasta, cereal, chips, crackers, sweets, sodas, etc).
You don't need to make the change overnight, but you do need to work on eating better and eating more.
As for your question... you
can get most of your protein from protein powder, but I'd argue you shouldn't because you're missing out on all the other nutrients that come from other protein sources.
Also... have you tried protein powder before??? Personally, I'd MUCH rather have a chunk of chicken than a protein shake. It's tolerable, but (for me) whey has that tangy bitterness like you might get from plain yoghurt even when it's full of sweeteners and flavors. Vegan protein is much more grainy and while I like 1 flavor blended up in a thick fruit smoothie, the other flavor I have is much harder to drink or even eat in a protein pudding (aka, adding as little water as possible so it's just a pudding consistency). I may be the oddball with the flavor thing here, but a glass of chocolate whey isn't like drinking a creamy glass of chocolate milk.