Is there any tutorial or something, for how to start with competitive programming in topCoder?
Yes, you can start from this link to join our competitive programming track: https://www.topcoder.com/community/arena
Then, test your skills using our practice problem: https://arena.topcoder.com/#/u/practiceProblemList
And learn about various tips and trick for competitive programming from our learning center here: https://www.topcoder.com/thrive/tracks?track=Competitive Programming
Make sure to join our Topcoder Discord server too where you can talk and discuss about competitive programming with our members from all over the world:
Let me know if you have any further questions, thank you.