Second track day crash. What caused the crash? Progress thus far?

Track day broIn the arms of an angelThis is my second track day , 1st lap, the session right after lunch. All our previous sessions in the beginner group have not lasted more then a 2-3 laps with the red flag coming out due to a crash. So I never got to really have fun. The session right after lunch I get to last call kinda late but they still let me on track and there is a lot of space between me and everyone else. My mind is just like go. I hoon it on my first lap and I'm having so much fun then I crash. I am still not sure what caused the crash. I know I did a few things wrong, like I missed the turn in point and was way off line I tried making up for it by leaning more but then it just slipped from my hands. After reviewing the picture I think the main cause was the kick stand lifting the rear wheel up. Some people are telling me my body position which I agree should be better but I swear it felt fine. I know I also should not have gone hard on the first lap. But I had warmers on and idk I just was too excited. I was more upset I caused the session to be red flagged again, and I apologized to a few riders in my group.This is NJMP Thunderbolt,beginner group(yellow/white I think) turn 5, gen 1 sv650 with Supercorsa SC's on.Would love to hear what you guys think of body position, cause of accident ...?Link to Album of the day:https://drive.google.com/open?id=1fzczCqCNtzK2TlnWXtIUff2gTCF-R3s2 via /r/Trackdays https://www.reddit.com/r/Trackdays/comments/8l3e1e/second_track_day_crash_what_caused_the_crash/?utm_source=ifttt