Help with finishing

I’ve been shooting around in my driveway for like 3 years now and I’ve just started going to my YMCA and playing pickup games. I feel like other than shooting spot up 3s and limited post moves my offense is pretty limited. I’m like 6’5 and can dunk semi-consistently. when I’m playing in games I feel like I can’t get to the basket and finish. I’m not trying to dunk on anyone or any crazy layups I just feel like I’m hindering my teams spacing, and was wondering if anyone had any tips to improve my ability to get to the basket