WB Cya and WOW, must be some pleasant shock after 5 years no SL
Yes, you are right about the KC community being a wonderful place to restart, make friends and meet a whole lot of nice helpful people. The staff and the team are also tip-top and dedicated to providing the very best product and customer service you can find in SL.
I'd say the very best thing to do first is to grab a few pairs of starters from the Mainstore. You have 2 weeks before you get your first offspring and by then you'll have learned some, and also beginners luck may give you something really great.
Then when you start to get an idea of how to breed and what to look for when you buy from the secondary market you can get started choosing the breeders you need and like, otherwise you'll load yourself up with kitties you may regret later. But then you probably will do anyhow, we all make mistakes in the beginning and go on a buying binge lol.
Keep chatting in the group too, you'll find a lot of useful tips and answers to all of your queries.
Have fun and enjoy