Very long story, so I will just comment on the crucial part:

1) Manager (middle-top level) in a big company - If you mean 10-20 years down the road, then yes possible, you can still get an entry level executive job in a MNC. If you mean want to apply to be a manager now, then forget it HR will just toss your CV in the bin.

I am assuming you mean proper manager job with appropriate pay & responsibilities, not BS titles.

2) Lawyer - Not very sure, but I think based on your background extremely unlikely in a law firm or legal counsel in MNC. Perhaps you can try paralegal jobs & try to work up from there.

3) Teacher - Private education companies possible, can try. MOE teacher, not likely to get it straight, maybe can try the PDGE route.