I played one character early on through the original campaign before dlc or any updates really and have been wanting to get back on and run a few more ch as ractwra but don't even know where I should begin I feel like the games already so different then when I played the first playthrough lol. Any advice would be much appreciated

I think if you didn't finish expansion campaign at least once, it is your only option to start.

Yoyo nice to see you back here. Rhykker has a video for people that are returning to the game for the expansion. That would be a big help for you haha