But I hate my current job
I have a bachelor's degree in English (literature)
Maybe if you had studied a STEM field (science, technology, engineering and mathematics), you'd be a lot more satisfied with your job.
In any case, you're highly unlikely to find a decent job as an English teacher in Poland. When you factor in your airfare, the cost of getting a CELTA certificate and the cost of getting a residence permit, as well as the fact that you will be working only 30 weeks out of the year with no income for the other 22, you'd be very lucky indeed to break even the first year. God forbid if you get sick and have to miss some work. You'd have nothing in the way of a rainy day fund.
That is, if you find someone willing to hire you and give you enough hours, which is difficult for non-EU citizens. It's too much hassle for someone with your qualifications (which basically amount to nothing, as you yourself admit).
I don't know. At the moment I'm not fully on board
Follow your feeling. Teaching English in Poland just ain't for you.
I genuinely care about the country, I like children, I like English, I like cultural exchanges, I'd like to somehow help.
No one gives a rat's a$$. If you really want to help people in need, go back to school, learn something useful that helps you get a job, and then you can donate a significant portion of your earnings or volunteer doing something a lot more useful for them then teaching English.
You could really make a difference if you dedicate yourself to improving yourself.