Hi and welcome!
Make sure your dog knows the cats come first, and don't tolerate any stalking or chasing of the cats.
As for puppy classes, the absolute best one is Carolyn Read's Train A Pup Time
I went to two lots of puppy classes recently (simultaneously) and Carolyn's classes were so much more valuable, informative and beneficial than the vet puppy classes I also attended.
Good luck and have fun!
Thankyou golden rules
have started puppy classes and have our last one on tuesday but really keen to do more so we socialise her well as not taking her out in puplic until vaccinated. Will have a look at a train a pup time.
Thanks again