Yes you got it :D
You also use RC when you comment and make a post. Everything you do on the chain cost RC, get around 50 HP and RC shouldn't be a problem anymore :D

You can go to hiveonboard.com to learn more or ask me, I am happy to help! Also if you run low on RC feel free to join this discord - https://discord.gg/9zQCH3Gj.

I am an admin with @tripode and @starstrings01 and we help newcomers via that discord and our community the blogging challenge :D