I just made this me and my friend have no idea how to start it, we got the name, the template, and the counter but we don't know where to like put the coding for html

If you have downloaded a template and want to use native html then just open the template file in a text editor such as Notepad and start typing.

If you want a wysiwyg web page builder then Google will find you lots of free ones. Download one. Use it to open the template and start typing.