Always changing my mind about a career

I think the title says it all, but yeah. I’ve had way too many different career ideas and I can’t make up my mind for what to go for. People say ‘oh go for what you’ll enjoy’ but I don’t know what I’d enjoy. I have quite a few interests (e.g. art, psychology, neuroscience) but things like neuroscience require you to do a medical degree first and THEN do it as a Master’s, and I highly doubt I’m smart enough to do Medicine. And then I start thinking of the negative parts of each career (e.g. not earning enough), or a new idea suddenly comes up and it seems better than the previous one so I abandon the previous one, so it’s just a never ending cycle of different idea changes. Has anyone else felt like this? And how do i overcome this, because everyone else seems to have a secure idea of what they want to do in the future.