Hey Dog!
Welcome to the Forum.
Here are my tips and thoughts:
1) Before you buy your Boxster get a PPI (Pre Purchase Inspection)
2) Keep practicing
3) IMHO, the Boxster is easy to drive because it is light and has good power
4) Don't teach your g/f how to drive stick, if you value your relationship (I tried this with my g/f about 18 years ago, and luckily we have been married for the past 14...but that one day almost ended it for us!
)
5) Budget in your potential car expenses/maintenance for a new clutch, because you might contribute additional wear & tear during your learning process
6) Make sure you get practive on hills. Especially when starting from a dead stop...like at a stop sign.