I used to think that Quora questions like this one should all be merged into one big question. But as much as that idea might seem to match official Quora policy, it isn’t compatible with how Quora works in practice. So it’s sometimes better just to answer the question:
I am doing competitive programming for 1 year but still a newbie in Codeforces. What should I do? (answer)
I’m doing most of my writing on Quora this year. For more information, see A Project for 2020.