Go to startup events. Listen to ideas. You will find some nuggets of goodness in there. This will also get you thinking. Don’t worry about ideas belonging to someone else. Most just have ideas and won’t even explore them, plus execution on the idea matters.
You can also join someone else’s startup. Nothing wrong with that.
Congrats. I’m one of the “ideas are worthless” guys. There is a specific situations where “ideas are worthless.” I hate patents, but patents are important. The point I am getting at is things are only valuable or worthless within the context that they are in. People tend to look at things only thru the view of the extreme, and that is where you get the “ideas are worthless” statements and ideas are worthless without the execution to give the, value. When you are sitting there throwing around ideas, that is where ideas are worthless. You had already gone out and done work. The idea and the work together created value.
Good job!