While having a Marketing Plan is always a good idea, it is not necessary to get started creating an online presence for you business with a website.
The challenge we have is trying to know just how serious you are about marketing versus the perceptions of just having a website versus having a very targeted online reputation.
The Basic Class will at least allow you to plan on a limited basis. The Advanced Class forces you to plan even more. But there are companies who decide to have a comprehensive Marketing Plan & Strategy in place before one page of the website is developed.
And of course your situation with time and money will also help dictate the feasibility of having a Marketing Plan & Strategy first.
But even if you can not invest in a Marketing Plan & Strategy, the Basic Class and Advanced Class will still be pointing you in the right direction and that would be a great start to your planning too.