I just think that i'd lose heart starting in c and being thrown off the back in the first 10 metres
Don't give up so easy.
You can't do any worse than me.
After spending almost a year learning to ride track (granny-aged women can be slow and timid learners)
I got lapped every race for almost a whole track season.
The next season, I nearly got lapped for a lot of that season.
Now that the make-up of D grade has changed in the last couple of years,
I STILL get lapped more often than not.
And I hate getting lapped. I keep on hoping that sometime I'll score a place.
winning IS much more fun than coming last.
AND there are a couple of "administrators" who I am aware of who would be happier if I didn't show up.
You are younger than me and you would be faster than me. They would be more than happy for you to compete.
Just give it a go, one step at a time. (to avoid any more relapses). Don't try too hard the first few times, and before you know it,
you'll be successful in C grade.