strength will build up through time , i was skinny and now i built decent muscles , first few months were hard af , stuck on 5kg bench press for 2 months but then stamina and strength caught up the pace , eat carbs such as rice and mochta9at but not too much before like 3hrs of gym and ull progress good , and dont get discouraged of the slow progress cs women build up muscle way slower , keep going and ull see the progress eventually