Help deciding Os

Hi, I'm learning python and I have purchased a 2015 MacBook air. I want to install Linux on it (Ubuntu) but my friend who's a developer told me to leave the MacOs because they are similar as operative systems. What do you think? Should I change the os and switch to Linux? Thanks. Edit: thank you for your replies. There are still so many things I don't understand about programming and os, sorry about that.