DSA prep for interview

As a Software Engineer with 6+ years of experience, can you guys please guide me on preparation for DSA. Consider my current knowledge about DSA 0.

How should I start? Approx how much time it will take? How should I know what topics are more frequently asked at my level? Any DSA plan for 0 to hero in DSA?

Apart from DSA I’m also preparing for HLD and LLD and I’d love to have recommendations from you folks about how to prepare these and where to prepare these from?

Also, if I’m missing something in my prep do let me know