Honestly I have felt this way for a long time now. I used to be a MFL secondary teacher.
I don't want to do that now, and anyway, my qualifications are not recognised here in Germany, I would have to do a course anyway. TBH after 13 years at home with dc I have had enough of kids. I don't know enough english grammar to teach it, I could learn it, but if I taught privately, I would still be stuck at home, and language schools not an option due to my own dc (most require evening lessons, I could realistically only do mornings to early afternoon).
I stopped working when I had my 1st dc, almost 13 
We now live in Germany, and I do not feel confident with my German, I am starting lessons tomorrow, so am aiming to rectify that asap. There are a lot of international companies here, and I know many people who don't speak German, but I don't know what they do or how to learn it. I read job adverts and don't even understand them and after so long at home feel totally unemployable.
My dc come home at about 1 o'clock every day, so feel it would have to be part time.
I feel trapped by the school and the language. I really am bored senseless at home and feel really at my limit. I day dream constantly about this but I really am totally blank as to what to do.
How do I even begin to work that out? I am working on the German, as that needs sorting regardless. I am now 42 and feel desperate to do something but I have no idea what or how to find out. I am so keen to get the ball rolling, I feel like I'm at the top of a hill with a giant boulder, just ready to push, but I look all around and I don't know where to push it, so I'm still stood here with my boulder and a sinking feeling. Does that make sense?