Congratulations!!
I also just flew my first solo on Sunday (12th oct) at Barton Aerodrome, I still can't get my head round it yet! Been showing off telling my friends and people at work
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For the record I also have 12 hours to my name, but I think I started doing the circuit around hour 10? so I have had about 3 hours of circuit practice including right and left hands, also the last thing we did before he suddenly let me go solo was do EFATO's.
I'm not as young as you though, I'm 28!! So an old man in comparison.
The feeling coming in on final over the M60 all on my own was lovely.
Happy flying!
Jon.