Hello and welcome to OBSRV.
My little advice: If you know your way around the scenarios but are somewhat insecure on what to do at times (because some elements change from offline to online), I suggest you start with Normal or Hard difficulties, with a full party if possible. Once you get the hang of scenarios and changed elements, move on to Very Hard, which is the most played difficulty in the server. Oh, and have fun!
See you around.
P.S: I just realized this post is 2 months old... so you probably don't need this advice. Dem necroposters...