HTML you can learn in one day,and all the day you will be playing with few Tags like Bold,font color,tables,images,links...it's easy as write what you want and where you want your stuff to show in your webpage ^_^
But if you want to make a community for games, you need to learn a server side dinamic language to make User registrations,scores,forums,medals,etc... like PHP/ASP are the most used languages to develop web applications =)
But believe me...you dont want to learn programming from scratch...i recommend to you Joomla, it already have all what you need for a community...it's easy as Construct to make games =)
pd...and of course, if you just want to publish your games in a website, just use Weebly,has everything you need to build a site online (drag and drop style)^_^