The quick connect fittings are specific to an RV and for propane only. The female part will have a shutoff on it. Don't use the ones meant for compressed air. RV dealers and parts vendors will have them. I got ours from an industrial hose supplier.
I'd suggest getting the larger 3/8" dia. hose for better flow. There are also different jacket materials and the better one is very flexible and one is always stiff and won't uncoil very well (annoying!).
Camco sells a 10' hose with the female & male quick connect fittings attached for around $30 which is a very good price (Amazon). Looks like it has the more flexible jacket but don't know the dia. I'd recommend a longer 20 or 25' hose though.