Belt is generally no problem, you adjust the size and clip it together youself. There are two sizes as far as I know, and most domestic machines take the more narrow type. They come in different lengths, but as mentioned most are about half a centimeter wide like
this one. I could not find anything on your model specifically, your machine has an unusually tall thread guide for the bobbin winder. If you have the shuttle, bobbin and the corrent needle in the machine it should be easier to get it going. Oiling and cleaning is usually straight enough forward to go by general instructions and use your intuition, the experts will help you with the threading if needed.