Welcome to the forum! Sounds like you're doing well already, good to see you've got the obsessive gene too, you'll go far
There's tons of info on here, also a dedicated section for decimal coins which might be good for you for general info. Many experts in all fields here as well, who are always happy to help out so if you need anything just ask. I would definitely recommend grabbing a couple of books if you haven't already, at the top of this thread above your post there is a link to the Rotographic books. Excellent references and some are a must have for any collector.