Weight issues

So I’m trying my best to gain some weight, I was 87lbs and now I’m 94lbs. I’ve only gained this weight by eating more roughly 2500 calories a day I used to eat maybe 1000. It’s been a process for about a month or so now and I don’t have trouble anymore simply eating the food. But I don’t want to only gain weight in foods and fats. I really would like to gain muscle mass but I don’t have access to a gym at least till February. Is there anything y’all suggest I do at home to gain muscle mass? Especially in legs, hips, and glutes. But also still arms.