New Idea : Web Page Instead of App?

After considering the build of my App, I realised that I do not have the skill set required to build something as complex as I would like it to be and therefore I have swayed more towards building a website.  The website also requires a large skill set but it is one that I can teach myself with realistic expectations. I have used HTML 5 and CSS before but very briefly, therefore I will refresh my memory of the skills I have already been taught and then focus on new ones. I will do this through tutorials and clips on youtube as well as a possible collaboration with a Computer Science student. Overall, I know this project will be a difficult one and I have a lot of work to do for it, however I am really happy with my idea and want to see it through as much as I can.