well like Newbie, sorry Dan! been away on holiday.
glad to hear you've made it into college!
assuming it's not a full time course is it? if yo can get on with a spread as free or cheap labour that would be a great thing to do along side your course, see how the things you're learning are applied in real life.
i'm only a short course plasterer, full time for 4 weeks, i dearly wished i was in a position to learn in the traditional way as it would have saved me 1 or 2 heart aches along the way but a man of my age with bills to pay etc it was the only way to get into it, started out doing small jobs i knew i could handle and slowly built up, i'm still doing a little of my old job as i always did that self employed but i've got so much plastering work to do now i've all but phased the old job out for good, taken me about 18 months but i feel i'm getting pretty well established now, getting repeat work and referrals from old customers so can't be bad.
i don't advertise anywhere other than a free entry on yell.com which brings in the odd job now and then, have my van sign written which does the same, had some quite cheap but suitably professional business cards printed for about £40, leave 2 or 3 when i quote, you'll be surprised where they end up.
Can't stress how important it is to be punctual and reliable too mate, gets me and keeps me customers, so often i hear 'i've called plasterers for a quote but they don't turn up'
keep reading on this forum, it's been invaluable to me and still is, can't thank enough the boys on here (you know who you are), also the NVQ book scob suggested i have got, it's a great book which will give you a solid foundation of knowledge to base your learning on.
Good luck!