But, I can't find any problems to solve! Don't get me wrong, I don't mean there are no problems around me, I just mean the problems that exist either a) Can't be solved by software, or b) Is not worth solving for multiple reasons.
I want to build a side hustle (App/Website) that I can generate income from. Where should I look for ideas?
Change something to make it better, or at least change something to make it your own flavor.
Choose something you think is very exciting or cool, it will be easier to work on.
Don't worry about copying them. You don't need to invent a new idea.
Sometimes you don't sell software to people. Instead you use software to connect people to businesses. You help people as much as you can, and pocket a commission if they get stuck and hire a professional.
Sometimes you help people compare products and get a commission from the business they choose.
There are so many problems that are too small for large tech companies, but that still deserve attention. You have many opportunities to be the local wizard, and to bring magic to your community.
Cabinet making is one that could use some help.