Hi polly. Welcome to the forum. Get yourself to a big dealer, or a show armed with the kerbweight and towing weight of your car. Then spend lots of time getting in and out of vans, sitting in lounges and lying on beds. You don't have to buy from a large dealer or show but it is a good place to start as a large ariety of vans are all in one place. Ask lots of questions on here, people are happy to help.
mel