I'm reasonably newish but now had a good bit of experience and I also did the 'I wonder how much..' thing at the start. It can all rack up, tyres on the rear if you've a partial right foot and if you get say accidents like nails... 2 rear, 2 nails, few months apart, not even using the dearest tyre it can rack up costs. Fuel, god don't make me think about how much I spend lol, servicing is ok but find a specialist and even then if repairs are needed it can be costly depending. Engine is strong though just keep that oil in check. Its not major league stuff but from the time I've owned it, it does seems to creep into the 'if you have to ask...' category of running costs lol.
Oh....and welcome! lol If you go for it, you will love it though!
EDIT - Also realised the mileage you put, tyres should be ok. Just watch the fuel and general insurance/tax. Its still a fair amount for something you won't be using that much