Getting into Dungeons and Dragons for the first time ever lol

When Life is Strange True Colors came out I remember a lot of people getting excited over the fact that their were Critical Role references in the game. At the time I didn't know what that was so I decided to check it out. Later on in the game, the characters have like, a LARP and I had a fucking blast participating in that.

I reallllly want to start a campaign with my sister to try it out. 

I honestly can't wait to start lol. I've never played before. I have a friend that said she'll be willing to try it out and my sister wants to be a player, so I took on the role of the DM lol.