I am basically a noob to 3d printing.

I just bought a flashforge finder for a good price on ebay, but the size of the printing board is tiny and it is not heated. Is there any possible way of increasing the size? (I'm not too bothered about the heated element, but any suggestions would be nice)

I don't really understand complicated 3d printing language, so, the more detail the better. Please don't tell me this is not possible, not what I need.