I'm a graduated student in engineering background, have taken basic coding courses for python and SQL. My target is to find a job of data scientist, and I'd taken an interview of DS jobs that includes 2 coding questions. This makes me aware that I need more solid coding skills for DS jobs, how could I improve coding skills for data scientist job in leetcode?

I'd done some problems in the 'algorithm' problem from easy to medium, but I wonder if I made a wrong way which is the road to software engineer.

Thanks for any advice!