keg corny

Hi All! I'm looking to get a keezer up and running but have none of the kit (apart from the freezer!) I don't really want to stretch to budget too high by going all new, so am looking around for some used kit first. Happy to wait so it's not a non-essential journey (if close to Devon/Dorset)...

Hello. Getting myself a corny keg and trying to suss what else im ordering. The quick disconnects say 5/16th barb on. Will 3/8 hose fit on this ? Asking as another set i saw had 1/4 barb. Not much diff i know but thought i would ask before ordering. Any reply wld be great ta. Also is it eSy...