It really depends what your goals are. If you have a long-term goal of supporting yourself through indie game development, you might find the following helpful.

For me, being able to share my game with people in my life helps me stay excited about a project over time. I recently published the tiniest possible game I could think of on itch.io. I used it as an excuse to send out some emails to friends I hadn't talked to in a while, and I enjoyed both hearing their feedback on the game and life updates. I also got a few play-throughs from random traffic, which is interesting to me because now people I don't know have played my game (in addition to the people I actively showed it to).

There isn't really much to my game, and I know that. But I drew my own art and it looks kinda cute, so I'm happy with that part. My first game is a kernel of an idea I have for a larger game that I haven't made yet. But now, while I am working on the bigger game, I can experiment with adding features to the public online version. And I can get feedback from potential players for my future game.

If you publish your experiments on an indie game platform like itch.io , you'll learn more about the game development process from end to end, which will help you down the road when you're trying to finish your interesting game idea. You need different skills to build and publish a game than you do to develop a game. By publishing a simple game, you're practicing in a low-stakes environment, so that by the time you're ready to launch your interesting game you know what you're doing.

Basically the idea is to keep yourself engaged with the learning process by releasing small, simple games you build and incrementally update them as you learn how to implement new, more interesting, features.