A note about the physical first; I'm 5'8, 120 lbs. and a B cup. I don't know if that's average or not, but there aren't many options for the drop-down boxes. Oh, and my age is 56, though I'm told I look 10 years younger.
There it is; an 'average' woman and at 56, 'older' isn't a stretch. I'm a married bi-sexual woman. My marriage is very strong, my guy a real gem, as you will see in my writings.
What I will write will be the truth, not fantasy; if the reader can deal with that, bonus; if not, bummer!