Even i have taking course from many different sites like-cosing ninjas,coding clubs and coding blocks
I am not able to solve that much high level questions that i wanted to be.
Coding is that thing the people is not able to lwarn in one day, it is same like brushing your teeth all day.
Because there are lots of concept in competitive coding.
I joined leetcode on May month 2020. i decided to solve too many questions and i solved around 200+ questions. in just 2 months of gap . These include interview level and practise level questions.

Practice and Practise makes me perfect...