Increase KW difficulty

Hey all, I increased my DA from 10 to 20 in 2024. I have a health domain authority overview and according to SEMrush a link on my site would be good for related authors. Anywho, I’m wondering if I can start tackling a higher KW difficulty. At the moment I’m ranking for anything between 20-45 KW difficulty (SEMrush) but would like to start going for 50 and higher as well. Am I ready or do I need to keep increasing my DA score? Thanks!