v.137 - Unleashed Update Highlights

Never did my farm. What do you do there to level?

You do quests there to gain exp for your farm.
There's a long set of main quests, and there are also 4 repeatable quests that you can get every few hours.
The quests teach you how the farm works and doing the first little bit gets your farm to level 2 easily.

The quests are simple things like Combine monsters, Play with monsters, Nurture monsters and such. Some will ask you for a specific category of monster, like Fairy or Golem.