Lots of good books already mentioned but I'm not sure I saw too much litRPG?
Regardless, if that's what you're looking for (with bits and pieces of other genres thrown in there), here's a good list:
-Mana Anxiety (you can read it here, but it's currently catching up to Royal Road)
-Salvos: this...
Other than my own (which you should definitely check out https://www.royalroad.com/fiction/42741/mana-anxiety) there’s The Legend of Randidly Ghosthound and Primal Hunter (already mentioned). For less loner mcs there’s He Who Fights With Monsters and Azarinth Healer.
Well, I've never used a magic 8 ball, but I think I would trust your judgment more:)
Title: Mana Anxiety
Premise: James (a girl) has severe social anxiety . The System integrates into the world, and she slowly transforms into a person trying to get stronger and stronger in order to be able to...