You could see if the likes of Wickes, Homebase and B&Q have free leaflest dealing with the subject - look for a rack near the doorway or by or opposite customer services - failing which ask the staff. You will need a good straight-edge, a very sharp knife (Stanley type) and lots of common sense plus patience. A strong ability to see things (shapes mostly) in your mind's eye is an asset. Always place tiles as hard up against each other as possible because if anything they will very slightly shrink over time. Test each one with the backing still on to verify fit (very slight size differences occur in manufacture) then place permanently. It is often best to start from the middle of a room rather than a wall, although this usually means that all around the wall zones you must cut to fit - but the effect is nicer (not a full tile along one side and partial the opposite, but more or less even balance all around). Odd shaped rooms are the most difficult to get looking just so.