I can appreciate your anxiety as I went through the same thing myself. But finally, after a lot of asking (of the Universe!) I was led to where I am now, in another country. Here, I teach adults and I really love my work. I'd just like to suggest that you do not limit yourself only to primary or high schools but also consider adult education institutions.
There are many adults, from young to older, who are seeking to improve themselves through education. My students have ranged in age from around 15 to 80-plus! If you look around a little, you may find some opportunities to work with them and help them. You might have to work some evenings or maybe even weekends, but the upside is that you can often have free time when others are at work. For example, it's after 2 pm here and I'm still at home as I teach evening classes today.
Best regards,
Lenky