Welcome to RIBnet! There's absolutely no problem with you joining in here, and it's always good to hear what other people are up to. I've moved this thread to the cruising section though as it seems like a more suitable place for it!
The most important book to get is a copy of West Country Cruising by Mark Fishwick which covers Portland Bill to Padstow plus Scilly. It's also great for a bit of armchair cruising in the winter
If you're going to Cornwall, the Fowey, Falmouth the Helford River and Penzance should all be high up on your list. Some of the smaller harbours like Mousehole are well worth a bit of effort to get into as well.
As Louise says, south Devon is well worth visiting too. Salcombe and Dartmouth are the most obvious, but again there are smaller places like Newton Ferrers that are wonderful.