Wow, well first off I would recommend making a normal website just to learn the ropes. Creating an online text based game as your first exposure to any html (or more complex 'languages' such as php which you'll need in order to make such a game) is basically asking for trouble. If you bite off more then you can chew you will likely end up accomplishing little or nothing of value and just getting frustrated.
Try going to primer and tutorial html sites, going through them slowly, learn the ins and outs of the basics so you have a solid foundation to build off of. Then you can move onto more complex ideas so that as you learn the parts that are complicated you aren't worrying about learning the basics too. This way you can compartmentalize the pieces you need to learn rather then having one huge surge of new things you try to learn and thus potentially attempt too great a feat.
It's great to see that you are ambitious, but you must also be realistic

So yes, to answer your question, my suggestion is to start by learning the basics of html, then php, then mysql (database stuff, which you'll need for such a game) and then build from there.
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