This part was really important and interesting for myself. In order to understood HTML_5, CSS, I studied at Codecademy. I have taken two free courses like: HMTL and CSS.
I prepared the HTML scripts and CSS with Netbeans tool. I would like to recommend Notepad++ tool is really useful. With it, you are able to see the command lines with different colors, that is useful for reading and program at HTML or CSS.
Git is a really powerfull tool. It is possible to have the control of all versions and keep the records of all the changes.
One thing that I like the most, is that you can only upload the last files that had been modified.
One the web page had been finished I proceed to upload it at GitLab repository