Breaking 35mm into types.
- C41 - colour negative. Although as Chris pointed out, there are a few C-41 b/w negatives about such as XP2 that have to be C41 processed.
- E6 - colour transparency slide film
- True b/w negative.
C41 is tricky to process at home, because of the high temperature required for processing. However, it can be done at home, there are a variety of chemistry kits available, but probably best to leave to professional photo labs at least until you've processed b/w. Personally, I've done it, but I don't like C41 - too tricky with temperature tolerances - but others love it. Poundland film, and indeed many of the 35mm films that you'll see locally on shelves, will be colour negative C41. So, best bet is to take it off to a Photo lab. They'll run it through a light proof processing machine full of hot chemicals. Depending on the Photo lab, you may have a choice of a) developed film only (in which case you'd have to scan it yourself with a film scanner), b) developed film with prints, or c) developed film with prints and / or CD.
E6 - they have to reverse the image positive, and mount them in slides. You'd need a slide projector or viewer.
True b/w negative. Photo lab machines cannot normally handle them. I use to use a local independent photo lab who would hand processed them for me, until I started home developing myself.
I like Chris's suggestion of a line of progression. Start with Poundland C41 colour (it's actually a very good film), get it processed at a photo lab. If you enjoy it, then great. If you want to try b/w, try a C41 B/W like XP2 first, and take it to the photo lab. If you are still enjoying it, then consider buying a decent film scanner as an investment - at least if you like to share your photographs online or digitally. Mine cost £120 new. By now you've started to invest. You'll very likely want to start home developing - at least b/w film. To just develop film, you don't have to have a dark room - although it can be fidgety, some of us use film changing bags to move the film into a light proof developing tank. Developing b/w film at home is surprisingly easy, and much cheaper once you have some basic gear and chemistry.