There are a great many Masonic forums around on the internet and each has something of value to offer.  One of the better UK forums can be found at LodgeRoomUK.com/forum where you'll find a very good mix of UK (ie Grand Lodge of Scotland, United Grand Lodge of England, Grand Lodge of Ireland) Masons, as well as a number of international contributors.  The forum is a very friendly place and new members always receive a warm welcome.

It's good practice to 'lurk' - read without commenting - for a week or so until you get a feeling for the tone of the place and help ensure that you don't jump in with both feet before testing the water.  If you decide to register then, after reading the rules of the forum, it's also good practice to make your first post in the "Landing Pad" topic to introduce yourself and say hello. 

There are locked topics that cover all of the Orders of Freemasonry but you'll need to make request to join these and the Moderators will check with other forum members for your entitlement to be there.  There's even a 'Jokes and Humour' topic that's not at all serious, although many of the jokes are older than Freemasonry itself!