Take a read through these two books:
Head First HTML with CSS & XHTML and
Don't Make Me Think: A Common Sense Approach to Web Usability
The first book will teach you how to the basics of building a web site. The second book will warn you about the design flaws that could drive folks away from the web site.
As for an editor to simplify building a web site, take a look at Crimson Editor (http://www.crimsoneditor.com/) or PSPad (http://www.pspad.com/).
Expect to spend a fair amount of time (say 60-80 hrs) working through these books, designing and implementing the web site.