Never talk yourself up after not having ridden for years...let alone raced
You know it'll all go wrong...horribly. As it did!
If it's any consolation I went from 3rd in a club championship to nowhere the next by the simple expedient of tuning a bike too far, blowing it up too often and then riding too hard to make up for it I started crashing. It's dead easy to go from front of the pack to the back. HTH