HackerRank is very good for beginners so even if you want to print your first program “Hello World!” then definitely HackerRank gives this opportunity to you.I am starting my coding program from hackerrank.
LinkedIn is a bit safer than other social media sites in that you are expected to connect only with professional contacts. Linkedin is better platform for a college student. it gives me many opportunity.
AtCoder is a programming contest site for anyone from beginners to experts.Atcoder hold weekly programming contests online. I am starting my first contest practice from the Atcoder.it give me so much confidence.