Hi, I'm turning 19 in August any recommendations for a first timer?

My mama says on my birthday she and my auntie are going to take me drinking, and I'm kinda scared about what it will do to me. I'm a chubby girl with Autism, ADHD, and Eczema. I'm also kinda allergic to mosquitoes if that matters. Are there any options that could make it a good time?