For a fee many printers will do file conversions for you.

Have you googled the things that mystify you, like 'flattened formats' and 'CMYK'? I'm often pleasantly surprised when things start to make sense by the 4th or 5th reading. Sometimes tech-speak still leaves me baffled even after careful study; other times I just need to look up additional mystifying terms till evenutally I figure out what theyr'e talking about. It's faster to pay the fee.