Good communication skills :) I'm sure how to improve have been described in excess at other places here, but TLDR would be(I'll consider you got basic algorithms covered):

1) Continue practicing problems that are challenging, but not too challenging. Try to land in a spot where you continuously learn something new, instead of repeating same concepts again and again for eternity

2) Allow plenty of time for growth

3) Try to maximise the amount of problems you practice in a certain time — find a golden mean for yourself. Don't think about 1 problem for a week, but also don't read 10 editorials to 10 problems in 1 hour....

4) Don't overburn yourself

5) Find a good community where you can grow and have fun with your teammates... Becoming red here takes years of practice, and it'll be boring and undoable by yourself

6) If have a chance go to training camps to learn new concepts, meet new people

7) Programming dudes are weirdos, don't be one. Communicate with people, that's also the way you learn

Another thing: your post might be downvoted by some stupid Codeforces users. I hope you don't mind. There is nothing wrong in your post. It's just because Codeforces has too many disrespectful/toxic users.

Learn some algorithms like graph algorithms and dp (you can find some fruitful tutorial blogs in codeforces about algorithms) and solve some problems for each algorithm that you learn. try to participate in contests. I suggest you to use c++ for competitive programming