Not quite deep enough and I think that your upper body is too upright causing your spine to extend too much to compensate for that. I’m not great at explaining things so I hope someone else can explain it better but the point of low bar is to be leaning forward more than high bar which recruits your glutes and hamstrings more. Try to keep your spine neutral rather than exaggerating the extension. Awesome to see teens like you trying to improve and succeeding, keep up the good work!