Looks like it’s free and you can just turn up. If you have a field near you it wouldn’t hurt to have a throw around a field first but it’s not the end of the world to go straight to it. It’s a nine hole course which should take you an hour tops.
Website says they sell discs - depending on the disc they offer you could get away with a one size fits all for a while although really you’d want a mid range and a putter. If you try it and want any disc advice let me know (or probably @japes as he’s way geekier about discs
)