Well, I did my first MATZ penetration today, at Wattisham, (not solo...that'll be tomorrow, weather permitting) but I handled all the radio calls and I was rather pleased that it all went ok (except it was embarrassing to find out that the transponder didn't work) but, as my RT examiner mentioned, I still tend to talk too quickly!!
I think a lot of students tend to have RT trouble at first. I though I was ok on a radio. I use one at work and have an amateur radio licence but I was a disaster for the first 3 months in the air. The PTT isn't called the "brain disconnect button" for nothing!
Passing the RT practical was a good boost for my confidence and hopefully it'll only get better from now on.
If you're having trouble, don't worry! you're not alone and you *will* be ok on the radio in the end.