[spicytuna]

What kind of video did you watch?

Either way, the only thing I can suggest to you is to get a job which you enjoy doing. Don't become an ALT or Eikaiwa teacher because it's the easiest way for a foreigner to stay in Japan.

You mentioned you were studying computer programming. If you enjoy doing that, why not join a company like Microsoft or IBM which has a huge presence in Japan? Your starting wages will probably be double of an ALT and you can always request a sabbatical and visit Japan for 90 days before you request a job transfer.