What the others have said. The club will have spare gear, when you’re ready to buy something you won’t have to ask what.
Broadly, archery (in the UK) falls into two churches, Field and Target.
Target archery is what you see on TV; concentric circle targets, measured distances, cricket whites, indoors or outdoors. Field archery is usually based in woodland, uses pictures of animals for targets and can be uphill, downhill, through gaps in trees and so forth. Your club will probably be one or the other; it’s feasible but unlikely that they’ll offer both.
Within those, you’ve got different classes or styles which govern the equipment you use. Some archers prefer traditional bows like longbows, some go high-tech with compound bows (like Rambo’s), some fall in the middle. Whatever class you ultimately choose, should you enter an organised shoot or competition you’ll be shooting against others in the same class so that it’s fair.