Questions: Health & Fitness

For legs I have been doing goblet squats and another type of squats sumo but the dumbell im holding it lower in the middle between my legs, I’m using 10 lb dumbell. then I do 100 calf raises while holding my dumbell. I have been working out barley a month and half & 2-3rest days. For butt I do hip thrusts and hamstrings I barley have been doing hamstring curls to my butt since 2 days as I got a new full body band it’s like a rope medium resistance. I’m eating 2,000 calories a day. I’m eating average but not double at the moment which is why I haven’t gained a lot of weight yet it’s hard eat a lot

*This was not a post asking if I should gain weight, I've already made my choice*

I have an extremely fast metabolism and I've struggled to gain weight my whole life. I'm currently 5'2 and weigh 100 pounds. I look like a stick with curves and I'm very displeased with my body.
I tried eating more calories than I'm burning, but nothing seems to work. I lose all the weight I gain (which I barely gain any to begin with)
So now I'm going to use apetamin. I've researched it a lot and it seems to work for people with even the fastest of metabolisms.