Don't waste valuable time trying to use the wrong method to get the right results. You won't win.
Right the First Time
The right method is to start with the plan I told you about here.. Then read the documentation and watch the videos the CMS provides to teach you how to use each feature: Choose it > learn it > use it.
Plenty of Time
You can create your new site as a free test site on this CMS and nothing you do here will have any effect on your live site. You don't have to do it all at once.
I already have. I can do more.
This site is a visual sample of what you can get without knowing all the ins and outs of internet technology. Be sure to view it on your smart phones and tablets.
I made demos to show you many of the exciting widgets in action on real web pages.Please see all of them, including the pages on the pull-down menu.
You Can Do It
Make a plan. Prepare your content. Choose a theme. Populate it with the widgets you want to use. Then paste or enter your content. That's all.
You may want minor changes to the templates once you have installed your test site. Best advice is to live with the template you have, or find another one that has all of the features you want. Stay out of the html/css section!
Remember that the point of putting your site on weebly is that you don't have to learn html/css or scripting and you don't have to pay a designer to get a great site.