ziggy, I am frankly outclassed in coffee knowledge by some who have already posted (such as PB) - but to reiterate/expand upon:
1. Start simple. Try decent varieties of different roasts (eg light, medium, dark) - though drip machines, french presses and the like. Move slowly, and try to understand the importance of freshness, timing, portions and methadology.
2. Move on to Espresso. Repeat.
Step one is significantly cheaper - but both will be fun.
That is well put and very do-able. Enjoying coffee is not rocket science, and the quality of what is available has really improved over the past two decades; (twenty years ago both the UK and Ireland were pretty dire for coffee outside some specialist places, but have really improved; then, central and eastern Europe had a brief love affair with instant coffee - they thought it was somehow cooler as it came from the west - in the 1990s after the Wall came down).
Oh, and try to avoid politics where coffee is concerned. Yes, like every other commodity, it is valuable, and hence a desirable resource. However, student boycotts (or, sometimes, worse, support) can sometimes backfire. When I was in college, the canteen coffee was vile, most coffee shops served disgusting brews, and we all agitated against American Imperialism and other injustices. Our weapon of choice was the boycott (invented in Ireland, in the 19th century, both word and weapon). Anyway, in defiance of American imperialism in the 1980s, our Students Union (mandated of course) decided to support the Sandinista Government in Nicaragua by buying vast quantities of their coffee and serving it on campus. I must confess that I have never quite tasted anything quite so vile. Mare'e milk in Kyrgyzstan came close, but didn't actually match it for sheer ghastly awfulness. It meant that while I may have retained a slight sympathy for the principle of elected governance in Nicaragua, (and the accompanying principle of non-interference on the part of the US), it took me over two decades to even sip a cup of Nicaraguan coffee again, despite the strong urging of left-leaning friends.
(We also boycotted Israeli oranges - on account of the political situation in Palestine, and South African oranges, because of apartheid, worthy causes all, but were then left with no oranges whatsoever, a bit of a bummer in the sun-deprived, bleak and dark reaches of north west Europe in winter).
Back on thread, I have bought a lot of coffee over the years from impressive organisations such as Fairtrade (they guarantee an agreed set price to the producers), and wholly support the idea of such enterprises. However, as with the Sandanista regime, I reluctantly concede that not all of the Fairtrade coffee is excellent; some of it is really good, but some is rather bland. You have to work that out for yourself. These days, even when I support such registered aid/charity organisations by buying coffee, I find that I want the coffee to be top-class as well.
Cheers.