Kandi,
If UK pilots are more or less comparable to their continental counterparts* then you shouldn't worry too much. Yes, there are cowboys in the skies, as there are everywhere, but good air(wo)manship and able radio operators should serve you well.
You might perhaps wish to inquire about the calmest moments to arrive - R/T of a busy circuit can be overwhelming to a newbie - ask me how I know!
Go for it! Plan well ahead, gain advice as you can then sort and filter it, and boldly fly in.
Enjoy! And if your ambitions go higher aloft/further away, remember the mid-August fly in at EBDT Schaffen!
*the rules of the air being so very different between the uk and the continent, I have some doubts there. But sooner or later, any pilot consistently playing the smart-ass will be outwitted by sheer gravity and other elementary laws of physics - Darwin's laws at work! So be at ease, if you fly all right you will be all right.