Thai food is great and it sounds like you’ll enjoy it. I’m quite envious that you’re getting to discover a new cuisine.
One proviso to that - Thai food does go big on chilli and heat so you might want to check with your waiter about spice levels. That said, let’s go for some classic dishes:
Starter - Chicken Satay or Tom Yum soup (likely to be hot though)
Main - Red or Green curry are mainstays, both delicious - Red is slightly milder. Pad Thai is another absolute classic and not spice led. If you go for curry I would suggest sticky or jasmine rice.
From that menu though, I doubt you can go too far wrong.