Generally one can find good and interesting solutions among the top voted ones, but it is not necessary the case of the best voted one.

I suggest you follow multiple highly skilled coders (like akar-0) and instead compare your solutions to them.

Well, you have thousands of katas, with all sort of problems and difficulty levels. I don't know what to recommend, try a bit of everything and see what's the best for you and what you prefer. All I can say is I learnt a lot from looking at other people solutions.

People vote anything "best practice". You should not care much about that, unfortunately it's the same on many katas.