As you are starting out, methinks you best stick to
http://www.metoffice.com/aviation/ and get used to using the "free to registered users" services as this is what the PPL exam will be based on. Start using the more user friendly sites like
www.avbrief.co.uk once you are over that minor hurdle.
Also, check out the flying press for free booklets called "Get Met" (can also be downloaded in PDF form from the Met Office site). This is a handy pocket guide to aviation met.
Just my 2 Monglolian tögrög worth
