Does anyone know if it’s possible/allowed for me to make a Georgetown account and start working on their application even if I’m only applying regular decision? I’m assuming it is but I just wanted to check, thank you!

yeah, that’s possible. Just make sure you don’t submit too early when you’re not ready. If you’re applying RD, take your time and review your app to make sure that it’s the best that it can be. A friend of mine applied RD even though he submitted before the EA deadline and I think his waitlisting was indicative of rushing and a lack of editing and patience.