New to the forum

Have just bought a C3 1.4 petrol 2012 VTR+ for Son to learn to drive in.
Really nice little car, drives perfectly, just a couple of questions if anyone can help?
1. It appears that I have a bit of a leak from the roof mounted radio antenna, can I access it via the rear interior light and replace it with a genuine OEM part? Looks as if it is the wrong antenna / generic replacement and is a bit loose.
2. Only have part service history, so can't tell if the cambelt has been done. (Year 2012, mileage 51k 1.4 4 cylinder) Have booked it in to be changed, however wanted to confirm if it defo has a belt?
Here is the VIN: VF7**************[VIN obfuscated, can be read by forum staff]
Also:
3. Any general tips to keep the C3 good shape ?
Cheers
Ade.