I've had some luck building toy websites for the main purpose of trying out or practicing some tools or skills. Most recently was a site where I was semi-automatically collecting stock price data, creating and posting stock charts and attempting (unsuccessfully) to identify buy opportunities. It was on the domain BuyTheDip.com. After I was done dabbling the site just sat for a few years until a buyer approached with an attractive offer. It was during the Wall Street Bets frenzy so I think it might have been related. Now the domain redirects to a Discord group, so I guess they just liked the domain name.

Point being, you might just keep building and dabbling and score a winner now and then.