I was busy researching how to best care for my Dahon as my father is recovering from heart surgery. Folders/Portables seems to be alot different from regular non folding bikes. They are not. Actually look closely at yours and compare it to a regular bike. With the exception of the handlebar, frame, seatpost, and pedal quick release levers, the bikes have the same components. With the assistance of my fantastic LBS, I am learning to maintain my bike. I just completed touching up the frame with paint I purchased from the model train store near my house as my LBS does not do this chore.
I would recommend to go to your public library and get any books on bicycle maintainance that is available. Then go back to your LBS, purchase some basic bike tools, chain and regular lubrication and ask them how to use it. If they are not busy and a reputable shop (like mine is), they will be happy to assist you. (Don't worry, they know you will be back for the major work on the bike).