DSA vs CP

I graduated in 2023 and currently I am working as a back-end developer (node js) in iot based start-up. My CTC is 5.8 Lpa and it is a WFH job.

I have some free time in a day and want to prepare for the product based company. I couldn't figure out what I should start with? Should I grind leetcode or codeforces?

Apart from this, what additional things should I prepare for product based companies? Any resources I should go through?

My target is to switch in the next 6 months with some decent pay.