A lot of sports have an idea of "follow-through": don't kick the ball, kick through the ball.
To use my kind of lame sports metaphor here, it sounds like you're making contact, but then you don't know what to do next.
A lot of advice in this thread seems to be along the lines of "accept that you're not the guy to do this & find someone else." Not bad advice, if you do know someone, but maybe a little defeatist?
Look, this is a learnable skill. I learned it from a cofounder who had it naturally. Just because some people have it naturally & others seem not to doesn't mean it's like "height" (can't teach that!).
When an entrepreneur really has follow-through, sometimes people say "wow, he or she has vision!" Don't be distracted by those people: learn to walk before you run. You don't need to be Jobs or admire Jobs or even care who he was to start a company.
What you do need to do is take one of your ideas - any of them - and abstract them a little. Why is your idea relevant? Who does it serve? What would be a worse way to serve those same people? What would be a way worse way? What would be a comically worse way? Did this need exist in the 1800s, even metaphorically? How were those people served?
As you answer these questions, you'll start to put your idea in context and you can decide whether you like the idea because it's a clever optimization of the world as you see it today or because it's a new way to serve the world in a way you want to be of service.
If you pursue ideas that are still interesting to you even after you abstract away your clever optimization, you may find you naturally have follow-through after all. This was my experience, at least: I still love most ideas, but when I find a market I'm interested in serving AND a clever idea, knowing what to do next isn't that hard for me. However, when my "worse" ideas seem just awful to me, I know it's only the cleverness, not the service to others, I am interested in.
With just an idea, the first sign of defeat put me at the wayside, and I had to rely on my cofounder to say "who cares? Here we go with the next step anyway! The future looks bleak, but we're chasing a point 10 miles beyond the horizon... keep running!"
Good luck! I can't tell you how many people say "I'd love to be an entrepreneur, but I just don't have an idea." You're closer than you think to figuring this out - don't lose hope; what you're missing can be learned.
If everyone had to be Jobs to start something, there would be no startups. You don't need 1000 mile vision to be an entrepreneur, but you do need to practice looking through the idea and seeing who it's serving, then holding on to that goal as you run into the next challenge. If you do that, you'll keep generating new ideas that help you get through the next challenge (rather than feel like the next idea should start from scratch).