Please don't be so hard on yourself, dear one. Believe me, we never truly know what something is going to be like until we get into it. Not a "mistake," but a "learning experience"!

Are you having to stand on your feet a lot, lift things that are too heavy, and so forth? Only your body can tell you what is too much. I was never able to do much physical work because of bodily limitations.....I ended up being a teacher and sitting on the desk a lot when I taught!