For your 1st sentence, I think you mean that your fins are negative, not your boots...? For the rest of it, it's not surprising that your boots are positively buoyant. I've never seen a negative boot. I think it's wonderful you want to dive well and I'm glad you'll be working with your instructor. It really just takes time. I'm happy someone can learn from my mistake of using the ankle weights. Far better to work on your body positioning and really learn the skill than take the short-cut I did. You'll get it, I promise and when you do, it's magical! Happy diving.
Thank you so much for the advice and words of encouragement! I will keep trying! Best wishes!