Now you might be thinking that the internet is large enough, and you should be able to reach millions of individuals, but there is in fact an entire demographic and market that you're missing out on.
The mobile market is huge, and almost everyone carries a cellular phone these days. Most phones are equipped with internet capabilities, and with that being the case, the design of a mobile website might very well be to your advantage, but there are a number of things you will need to take into account before you begin.
First of all, mobile websites have changed. Phones are now more than capable of displaying CSS and other more complicated languages, and in addition to that they will need access to various servers. You can no longer get away with using a painfully simple HTML page to play into the limitations of the web browser, and with that being the case, you might need to hire some outside help when learning how to build a mobile website.
There are companies that specialize in the construction of mobile websites of course, and taking advantage of one might benefit you in ways you have not even imagined if you do not know how to make a mobile website offhand. First of all there is the factor of time!
How much time would you spend trying to learn how to build a mobile website that fit the specifications of every single mobile device out there? It should also be understood that mobile devices and their browsers are constantly changing, and you will need someone to keep up with the technology.
Computing technology is easy to keep up with, but mobile phone technology is another matter entirely. That being said, you more than likely do not have the time or the energy to owe to the progress of mobile phones and this is undetected a job for trained professionals. Sure, you could build a nice .mobi website and redirect mobile browsers to it, but would it meet today's standards? Would it scale for second generation phones? Would it meet the expectations of the users?
These are the questions you need to ask, and these are the temporaryities that you will need to prepare for when you are thinking of learning how to build a mobile website. It's hard work, but with a helping hand there is no reason you should not be able to pull it off! The entire mobile world is out here, and it is waiting for your website.