We are currently working on a few fun things to implement leveling. Currently if you have Level 1 in DFS (Can exchange your XP to Levels in store). For the fishing, anyone below level 1, you can catch normal fish and Bass at tournaments. You will need to at least be at least Level 1 to catch extras such as salt mill, paper, nails, and shrimp.
To exchange your XP for Levels. Click the Convert XP to DFS Level and select the XP type you want to exchange to reach Level 1 and higher.
The higher the level the more it also increases your chances of receiving double items from harvests.