Not as nervous now
I tried taking my wife to the Magic Circle in Quartzsite Arizona, it is a BLM camping area that is clothing optional. She was just too shy to go outside. She did look out the windows at the people enjoying the freedom, but I just could not convince her to join us.
If I get a plus-size wife (one open to going nude, naturally), I'll be sure to show her this group. If possible (i.e. available in the US, not just UK), I'd certainly tune into episodes of Naked Beach -- the two most BBW recurring stars being Felicity Hayward and Kayela "Lala Love" Damaze.
My wife is also shy about revealing all her curves and scars. We are new here, but I honestly think its more about the freedom, comfort and acceptance of the lifestyle, not the body types. Of course women face so much criticism over their appearance in and out of the work place that its understandable that they would be reluctant to go public nude. I wont push her, but I hope we will at some point participate in social nudity.
You may want to try a clothing optional resort or a non landed nudist club that allow women to disrobe at their own pace. Yes society has placed way too much demand on women when it comes to looks. Give us a natural looking female with no makeup and a sense of pride about her looks any day. They usually have wonderful personalities.