He is referring to the Pentax P30N, an SLR from the middle 80s. It is the P3n in the US.
I use http://www.snapsphotoservices.com/ They are very good, fast and cheap. They are based in Bournemouth, UK.
You can see here samples of Fomapan developed and scanned by them on the Flickr page of this chap: http://www.flickr.com/photos/chris10585/
For some reading, any book from the 80s and 90s about general photography or 35mm photography should do. You might be able to find in your local library books by Michael Busselle.
If you don't have the manuals, here you can see them in PDF format: http://www.butkus.org/chinon/pentax.htm
Kentmere and Fomapan might be on the cheap side, but they are good films. Foma has improved production quality and a new base film in the last year. You can find Fomapan 100 at £2.60 a roll with Silverprint and for Kentmere the cheapest is around £32.00 for a pack of 10 rolls with Discount Films direct. They are good and reputable companies operating for many years.
Amateur only means you don't make money out of it. It doesn't mean you aren't an artist or a knowledgeable chap!
Enjoy your photography!