Have 6 months free before I join, In dilemma what to do to have a worthy career

So guys my company had delayed joining by 6 months and right now I have ample of time to upskill. So need some tips about how and what to learn to have a good career in tech

Right now I am focusing on backend development and DSA practice.

Also would love if someone can tell are these 6 months really enough to make a great career given that I have solved 300 leetcode questions already.