You get in basketball shape and condition, along with gaining basketball skills by playing basketball against good competition. Make that your priority, you can supplement with drills and shooting, etc., but playing intense ball with good comp should be the majority of your bball conditioning.
Push your strength up in the weight room on the main lifts, you can reduce the assistance work as you play more ball but you should still be able to squat/bench/press/pull up a couple of times per week and improve.