|So, you got your hyperlink sorted I hope?|
The three differences I mentioned:
Index.html is a capitalized file name. Although not required, lowercase files, extensions, variables, etc. are universally accepted among web development languages.
index.html is lowercase, and what you have. If you typed the web address in uppercase, you wouldn't find the file.
index.htm is a different file extension, but also a HTML file. It's just personal preference and makes no difference performance wise which you choose to save the file as. Just make sure your hyperlink is exactly the same as the file and extension you're linking to.
So, Index.html, index.html, and index.htm are all different files and you need to link to them perfectly.
I couldn't agree more about the advertising and visitor analysis, especially Google services like Adsense and Analytics. If you're using Firefox or Chrome as your web browser, you can install an addon called "Adblock Plus" which does an amazing job. You can even set it up to block visitor analysis tools, so hopefully that will speed up your web surfing.
For Firefox: https://addons.mozilla.org/en-US/fi...
For Chrome: https://chrome.google.com/extension...
There are two important things to know about WordPress:
1.) Download it directly from the developers. This goes for anything a web host offers as "Instant Installations." Hosts often modify the code to disable features or add advertisements. You're much better getting it directly from the source and just use your host to host the files. All you need to run WordPress is for your host to support PHP 4.3 or higher and a MySQL database 4.1.2 or higher. It's likely your host has at least version 5 on both of those requirements. Another good thing to have is the mod_rewrite Apache module enabled. You'll have to ask your host about that. This will allow for "pretty permalinks." It will turn www.mysite.com/?p=123 to something like www.mysite.com/categoryname/articlename/ just like you're doing now.
2.) There are a lot websites offering free WP themes, and there's a good chance it will have hidden code to track your site and even backdoor your account. You should stick with the themes offered at: http://wordpress.org/extend/themes/
Migrating all the pages shouldn't be a problem. Writing an article can be done two ways: by using the Rich Text editor which requires little to no HTML experience, or the HTML editor. You should be able to copy the HTML you already wrote over to each new article or page.
Yes, there is a lot to know when it comes to web development, but me and many others like me are here and more than happy to help as best we can free of charge. If you need any help, we're here for you. =)
Apologies if I don't respond to your reply immediately. I don't check this site daily.