Question about skinnyfat

17F, 110lb and Im skinnyfat. I’d like to gain muscle.. but I really have no clue where to start

Ever since first attempting to gain muscle around 6 months ago, I gave up. I ended up gaining lots of fat because I was told to eat 2000+ calories and to get 100g+ of protein or I wouldn’t gain any muscle. I felt really sick, almost throwing up and that experience fucked me up mentally for awhile

Although since then, I slowly increased my caloric intake to approximately 1600 calories; comfortably, which is big for me. By just adding little things to already healthy food (Apple + peanut butter) it helped me a lot

I don’t even know why I’m writing this. I just really wanna try and start up again but I’m so scared and honestly have no idea what I’m doing. Cardio? No weights? Bodyweight? Sleep? Protein? Carbs? It’s stressful..

Any advice or tips? Preferably from a past skinnyfat girl/guy with actual experience or a friend. As you can tell I’m pretty lost