For the B-Minor Pentatonic, just use any progression that has the starting chord of b-minor.

Here's a good one for practicing the A-Minor Pentatonic.

Am, F, C, G

For playing 5 months and knowing the major and minor pentatonics is a good start.

It is very frustrating at times, but when you start to excel, you tend to learn new techniques and tricks faster which tends to keep you more interested.
Just keep practicing. I remember the first few months that I played. I couldn't get anything right. My fingers wouldn't work how I wanted them too, I hit multiple strings all the time, but then I just kept at it and got better.

Don't worry it's still frustrating to all of us sometimes.

I don't know about everyone else, but I never force myself to play if I don't want too. That takes the fun out of the instrument. If everytime you see a guitar you think of work, then the instrument will no longer be fun for you. So don't just practice all the time, take some time to jam and it will a lot better.