Hello, I recently bought this game to play it with a friend because Diablo is basically dead. We are both having tons of fun with the game and we are probably buying the xpac when we reach 85 on our main guys. However sometimes he isn’t on and I would like to find new people to play with and chill. Currently I have a lvl 31 shaman alt, but I am down to start fresh.
Welcome to the forums.
No need to wait until level 85, AoM adds two additional acts at the end of the vanilla campaign. As you play through the game three times, it gives you additional areas, items and bosses to fight in each playthrough 
Welcome to the community! I would recommend checking out the official grimdawn discord http://www.grimdawn.com/forums/showthread.php?t=43768
Welcome to the game and to the forum. 
I second Valinov’s advice to check on the discord - there’s a section there to search for people to play with.
Also mamba’s advice about getting the expansion. No need to wait until you’ve maxed a character in the base game. AoM works right from the start if installed so you can jump into it even with your current characters.