See below for a helpful check-list. One way of putting a toe in the water, so to speak, might be to try one of the excellent inclusive holidays, where you arrive to find your tent and all the equipment awaiting you. That way, if you find you like it, you can invest in a tent, caravan or motor-caravan according to budget and interest. There are places on the Internet where you can view all the possibilities from new to second-hand. Alternatively you may find that the temperature never falls below 90F in the shade.
Many Internet sites provide holiday details.
There are usually very good value out of season breaks available, sometimes for mid-week but more often for a long weekend. Some are excellent value for money, especially in the UK in January or November. A large city, like London, is often a great place for a winter break. Ceefax is also useful. Such things as fishing, walking, painting and music are readily catered for.