Hello,
Before I start a project like this, I have a couple of questions.
1) Do you need crop and registration marks?
2) Is it safe to assume this design will me split to separations for burning to plates?
3) What is the paper size being printed to?
4) What is the finished page size?
5) What is your desired output file type(PDF) ?
6) Are there any spot colors involved?
I used to work for Adobe Tech Support. Converting RGB to CMYK is a simple enough task. It is best to know the desired output color space (color profile) for the press being used.
Just a note, Corel Draw is not the correct Corel product to do page layout in. Corel does not have a proper page layout software. I much prefer to work in Adobe InDesign, in my PC. With InDesign, I can properly manage a layout and make a PDF. In Adobe Acrobat, I can preflight a file to make sure it is print ready. Most common generic pre-flight profile is PDF/X1-a, but I can use whatever the print company requires. This allows me to check for errors, and correct them.
Thank you,
Robert