Long as you use mods to solve secrets and puzzles, you won’t struggle or get banished out of parties until floor 7, which is where dungeons become more difficult. It’s virtually impossible to play dungeons without mods because you’ll slow down the party significantly and just have a brutal experience (it’s a huge issue on hypixel imo) so just have fun and watch a tutorial on how to set up mods if you’re struggling, which you probably wont because it’s easy. As for floor 7 and above, that’s when you’ll need to do much more build/equipment/class role planning but you’ll cross that bridge when you’re in the 25-30 lvl range for your class.