Yep. There’s 0 through 3. The higher you get the more stuff you can do.
If you go to your character page and add .json to the end of the url it’ll take you to a page with your attributes. Once there, look for the highest trust level it shows.
You’re level 3. https://us.forums.blizzard.com/en/wow/u/Pebrock-kelthuzad.json
https://us.forums.blizzard.com/en/wow/u/Pebrock-kelthuzad.json