dear as far as washing is concerned do it from any petrol pump they do a very nice job,, also after wash ask them to spray diesel ,, that will help in avoiding rust and will also give it really nice shine,, but do it in din ka time.. total cost will be 60-70 rs,,including diesel,, if u want to it urself wash thoroughly the mudguards from both inside and outside,,some ppl recommend paint on inside of the mudguards to protect against rust,,
oil change is very easy just make sure that ur bike has been running for a while say 10 minutes when it is warm just remove old oil and make sure u remove all oil by turning the bike sideways ,, then just put new oil nothing more,