Work burn out

I currently work in a drs office and I am completely burnt out. I don’t feel like this is my calling, honestly I don’t know what my calling is or what I’m good at - I love working with kids but my degree is in medical field & honestly I think I want out 😔

I want more of a flexible schedule, where I’m not doing the same routine every day. I saw online there is a position in the county for a substitute teacher, would I be absolutely nuts to go for that??

I mean probably no benefits but If I’m happy I’m sure I could find a way to make ends meet.