Don't worry about it OP.
I am young (35) and I am also overweight.. If anything, this hobby reminds me to work out and have better cardio because then that will mean more fun and mileage lol.
Most SPs care about your attitude (showing respect, asking before doing certain things, donations in the first 2mins, etc) and hygiene/grooming over many things.
Though my age gap with the ladies are much shorter than yours - I already feel uncomfortable with most girls under 25 because I feel they don't even know who they are mentally and sexually yet. It's awkward for me to kind of be there to help them "grow up". Lol (the Angels are a rare exception, but they hire ladies with a good head on their shoulders and can carry good conversations.. And not just kids that talk about snapchat/Instagram and going "yaaaaasss".. *shudders*)
Most of the ladies that are on here who posts frequently would suit your bill.
Like I and many other people have mentioned before; the ladies that are working for over an year and has any sort of following all have great understanding of the human condition and are often the most kind, gentle, and loving human beings I've came across..
Most of us go back not just for the "main event" but for the conversations and the companionship.. Just don't fall in love too quickly, LOL.
Cheers.