Well done, Sara. I'm glad you aren't discouraged, because looking at that field, with so many Cat1 and Cat2 racers in it, it would have been astonishing if you weren't outgunned. Lots of experience there as well as speed, which is why you'll have found yourself being pushed around. Speaking for myself, I would not be throwing myself to the Cat 1 and 2 wolves, they'd eat me alive. So congratulations on your effort.
So, you were lapped four times. Yes, that's a big margin. But looked at another way, it means that you were riding a bit more than 10% slower, solo and in the wind, than a Cat 1 winner who was with and in the pack through the race. Plenty of reason for encouragement, right there.