How to shoot better in basketball?

i want to shoot better in basketball, when i'm alone i can shoot but when im playing a game i cant shoot, how can i improve cuz when i jumpshot i usually hit back rim but its very accurate how can i tell when to put little or more muscle into my shots? and i aim my elbow towards the rim everytime so whats do i need to do? and my net doesnt go onto 10 ft so i cant paractice