Go with python because from replit, they said:

A dynamic language emphasizing readability.

Which basically means it's really easy to understand. After you mastered python, all the other ones should be just the same with slightly different syntax.

python because it seems to be the easiest for all, html because you can make literally anything with it, for example: Repl.it, and any others listed here

Python, JS, Ruby and Go.

try python. It's the best.