@keets993 can OLSAS get your letters of recommendation and transcript through the LSAC? One of my recommenders was an adjunct professor, so I'm not sure if he still has access to his school email if I need him to upload the letter again.
Your recommendation letters may be a good spot for the activity mentions. Good job being so motivated and having this initiative to start early. So when you're done, you'll be about 22 if you start soon and are a full-time law student?
I think profs are preferable but admissions knows that sometimes TAs are who you interact with on a daily basis and who actually know your work. So it wouldn't be a bad thing especially if it's a glowing letter of recommendation.