New DM

[Luphey]

When I say pre-made, I mean that I'm making a linear , one shot quest. I'm mainly doin this because we have 2 complete beginners in our group, that I am teaching. I had planned to roll out 9 or 10, 5th level characters. I wasn't going to give them names, personalities or backstories. The players can make those if they wish. I was gonna let them pick a character and roll with it. Why roll out some many characters? Because this is going to be a trial by fire of sorts ha ha. I'm planning out a difficult "dungeon" that will probably get a few of the characters killed. It may seem a little harsh but I feel this is the best way to throw someone into D&D.

Any suggestions on classes I should roll out? I have a few already, based on classes my players want to try. Also any good encounters that could throw my beginners for a loop?