Servicing schedule, what should be done.

[Dead Eye]

You don't have to be mechanically minded to sort the basics. Oil change and air filter change are very straight forward - oil filter can be a bit of a pain if its stuck on though. Plugs are equally easy if the bike has been looked after (mine are semi-rusted but its got nearly 88k on the clock)

Is your bike your only form of transport? Do you have any mechanically minded friends of helpful foccers nearby? Might be worth offering beer tokens for them to help you out so you can see how to do it all next time and save yourself a ton of money Oil + filters is maybe £30 (possibly £40 if you change up to a K&N air filter), plugs are about £20-25 for a set

Carb Balance could be an option but its up to you, if (once its warm) its running fine then I personally wouldn't bother and valve clearances aren't an issue at 19k as previously mentioned by Fazerider