As AndoniP says, if you haven't any experience of flying a light aircraft then go for at least an hour or a half hour trial lesson.
I see you are in Belfast, I am currently learning over in Newtownards and though I don't have any other experience of flying clubs to compare it too, I have been very happy with the club and instructors and would recommend it for your trial lessons at least.
PM me if you have any more questions.