There's a senior member on this website - very good contributor - whose signature says "Learn your HTML wisely before trying to PHP". Very good advice. Frontpage is no use for learning the nuts and bolts of HTML.
Buy a book or use online tutorials to get a thorough grasp of HTML/XHTML before trying PHP (should take you one single weekend if you apply yourself and use your notepad/browser to experiment with all the techniques you need).
Step 2: Read Drew010's signature and buy the first book "Beginning PHP4", or choose a similar PHP primer (SAMS, New Riders, O'Reilly ...). Read it morning, noon and night and try out all the major concepts in the book. You can download the code for some books, but I seriously recommend typing it out yourself until you know what you're doing.
Best o luck
Norman