If your main goal is to start doing commissions, the first step is to work on your skills to be competitive, and post stuff. I suggest that you make connections by exploring many different communities, and more communities within them, and showing your cool creations there.
For example, I'm on a mc youtuber's discord server, as well as the servers for Blockbench and datapacker groups. People I got to know happened to know others who were looking for artists, and that's how I got my first commission!