One at a time.
Until you win.
You don't know which one is the best idea, so just pick one you most want to finish and build it. Market it. And if it doesn't work pivot or move on to the next idea.
The way I look at it is you build ideas into products and sell those products. Always charge. That way it is relatively easy to turn a small, but meaningful profit. Then, keep building products until you find a "hit".
Even if you don't get to your home run you have some nice cash flow so you can keep doing what you love.
Think of yourself as a band. You love making and performing music. The first record might not be a hit but you keep making music until you come up with something that resonates. Your startup is a band. Keep cranking out albums until something resonates.