You're not bad at the game, don't worry, you can succeed basically doing anything in the game so long as you work long enough at it.
That being said, there are a bunch of ways you can work on upping the amount of cash you're making a day.
1. Stop selling resources, your image shows you selling fiber, which is a useful allaround resource as you progress through the game. Resources sell for basically nothing so most of them you just want to keep for the loads of crafting you'll want to do later on. Prioritize just selling the stuff you're collecting/cultivating for selling.
2. Explore all aspects of the game, so many parts of the game are intertwined, you really want to try your hand at everything to make cash. For example, start mining more if you aren't already, and use those materials you gather to make sprinklers for larger fields of crops.
3. Expand outwards, you have to spend money to make money. As you collect money, try to funnel it primarily towards setting up more ways for you to make cash, or in the tools and items useful for helping you. That means buying more seeds, buying some resources if you need them, tool/backpack upgrades, food, and more.
I would also start prioritizing finishing the community center, it unlocks a lot, and plenty of that content will help you make more money too. You don't have to make it your immediate goal, make the bulletin board your goal for the year or something, and be diligent not to miss anything as you pass each season by. Do so and you'll be absolutely golden, good luck!