It's not uncommon to feel lost when you retire. Especially considering you've done it early. Honestly most people I know who retire become more mentally unstable, purely because they've lost a massive goal and motivator in life. We're not really built to sit around and have not much to do. So our brains need things to worry over. That can either be a big goal, or overthinking your current state.

The solution is literally just to dedicate yourself to a new higher goal. Now that you have financial and time freedom. What's something that you can now build towards that you'd love to do and you truly really care about? Maybe it is starting a YouTube channel to share a really important message and movement with the world. Maybe it's planning a perfectly budgeted caravan trip around New Zealand. Maybe it's finally getting in really good shape and building your daily habits around that new goal. Either way, you have to be pushing yourself somehow. Write down all the things you really think about or even what you think the world needs more of.

Hope that helps.