Your idea deserves better than becoming another story about what you almost built.
RESILIENCE
RESILIENCE
Unbuilt projects do not disappear, they become anecdotes, and after enough of them the anecdotes start describing a person rather than a set of circumstances. Each one felt individually reasonable to postpone. Together they become the account of what you did with your time.
Pick the one you would most regret leaving as a story. Give it a genuine attempt this season, with real hours. Even an unsuccessful attempt changes the anecdote into something you tried, which is a different kind of memory.
Which nearly-built thing do you still tell people about?
Free, with nothing to buy inside it.