Does anyone have good climbing tips?

Get good at jungle, and focus on that. If not, then find a duo partner that's higher skill than you and play with him (doesn't have to be ranked) eventually you will learn the mistakes your elo makes. I jumped from Silver to high plat this pre-season alone and that was from playing with him and learning everything I can from playing against diamond players. Now I tend to carry most of the plat games I play and I'm a support main.