honestly, there's no real way to know that you're improving your game if you're not playing against other people. you can make 3-pointers all day, dribble around quick and fast, and make every single one of your lay-ups, but you're not under pressure. no one's playing D, you don't have people switching up D on you, you aren't driving on guys that are taller than you, you aren't in a pressure situation.

practicing on your form, FTs, and comfort on the court and dribbling is great. but, being able to do it in a game is a totally different story. it's just like shadow boxing. can you do what you do on a bag, speedbag, in the air or whatever in the ring against another person? only experience will be able to tell you that. keep practicing, but you should definitely find pick-up games and hunt them down. they're there, just got to get in and call "next".