Paying commissions feels like a travesty to many but those galleries earn every penny of it. Look at what you get for what you are paying before you commit to the contract. If it doesn't feel equitable, just don't sign the contract and hang on their walls.
Sometimes, we try things to see if we like it. Other times, we do things because we said we would. As artists; we experiment with new concepts, materials and ideas. It doesn't matter if you stick with it but I can tell you if you don't give it your best effort, you will really never know the truth about what can happen.
Being an artist isn't always about the art materials. Sometimes it is about business classes and finding your focus. It isn't as much fun but it can be work the slog.
I'm exploring the ups and downs of grant application and limitations when you receive the award. Is it worth it in the end? It is if you are clear on your focused goals.