Welcome to the reality of indie game dev. Great ideas are comparatively easy, effectively dirt cheap. Like most things worth doing in life, the difficulty lies in actualizing those ideas and bringing them to reality.

The only real solution is experience. Beyond that: Learn to treat your “amazing game ideas” like cattle instead of pets. Prioritize rapid prototyping of your main gameplay loop/systems before you fall in love with the set dressing.

All of that said, by just finishing a project you are already further along than 90% of amatuer devs. The best takeaway from 4chan’s long running amatuer game dev threads: just like make game.

Creating something that exists beyond your imagination is always progress forward. Releasing a game, even one that doesn’t meet what you hoped, even one that’s objectively shit, is monumental progress.

Now toss it up on itch.io or whatever storefront and start on your next attempt.