You can find a club in most large cities. In the US at least, the biggest problem is getting far enough away from the city so you don't become a hazard to commercial plane traffic.

I live in the DFW metroplex, and you have to drive almost 100 miles out of the city to take-off and then you're pretty limited on where you can fly due to the abundance of small airports nearby.

There are maps available that show what kind of airspace is around you. I forget the specifics as it's a been a few years since I looked into it, but there are different designations for what/who is allowed to fly where and paramotors are very low on the totem pole in terms of priority and access allotments.

Just google for paramotor training, there are many schools in the US. I suggest get training near the place you plan to do most of your flying, because flying at the beach with constant, laminar, mid-strong winds is very different than flying at the countryside with bumpy and low-mid winds.

If in doubt, learn to fly near the beach. The views are amazing :)