Hi, I'd never been camping until DH took me either, and I also thought I wasn't going to like it! To my surprise I enjoyed myself and we now go a few times a year. We tend to do 3-4 days at a time though, not a full week. How long as you going for? A weekend would probably be plenty for your first time, and maybe pick somewhere that's not so far away that you could come home after the first night if you really hate it!
We pick smaller woodlands campsites which are really quiet and peaceful, we leave all tech behind except mobiles in case of emergencies which stay turned off in the car, we take lots of wine and nice snacks and do gentle walks to the nearest pub in the day and sit and chat and look at the stars at night, it's super relaxing.
Even the sites we go to which market themselves as 'wild' always seem to have toilets (sometimes compost ones and sometimes normal flush ones), shower blocks with hot water and washing up points, so it's not really that wild if that is a concern for you! And if you go to a larger site you can find places with even nicer facilities, proper mirrors, powerpoints for hairdryers etc, although I find part of the joy is in letting myself go a bit feral and not worrying about hair/make-up/shaving my legs etc for the weekend!
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Do try and find somewhere that allows campfires though, as it's really nice in the evenings even in summer to have a fire to sit around in the evening. Plus we use it to cook on.
Also make sure you go for a wee last thing at night as it's really rubbish waking up in the night and having to get dressed, put shoes on and traipse to the loo to pee!