Well Done RISHY! I did mine a few weeks ago and ironically i had to do an orbit as well...
I got nervy after being told to orbit and called the tower " XXX on first solo Circuit" and they promptly replied with "XXX looks like you might have to complete your first solo orbit then" Cheeky buggers!
In the words of my instructor you only get to ever do your 1st solo once so enjoy it!
Well Done again