Hello all. I'm a bit new only lvl 20 atm. So far I am loving this game. I've ran into a wall sorta. I totally understand a game to have more mid and even end game content. But today I wanted to do my daily resource dungeon, and found the xmas dungeon instead...

Ignore this I found the skip button right in front of my face that lets me move to which dungeon I want to play in.

Welcome to the community! The xmas dungeon is a bonus one that if completed all 4 weeks results in a legendary monster, so I'm guessing that's why the level of the first node is set where it is.

Secondly, and this one took my awhile to figure out, there are several dungeons available everyday. Make sure to scroll right and you should find your normal food and gold resource dungeon, but don't be afraid to attempt the others and claim what you can in them. Eventually your monsters will get strong enough to get through them.

Ignore the Xmas dungeon for now since it's a special thing.
Focus on the regular things that do scale. The daily dungeons for gems, runes, epic cells, etc.
Remember no new dungeons on Sat and Sun, so it may feel like you run out of stuff to do on weekends.

Keep at it and in time you'll be able to handle all the special events and special dungeons, too.