Starting out with WordPress has made a lot of things, especially when it comes to marketing, very easy for me. There's a free version that is used on over 700.000 sites right now and it got there mostly organically.
That said, if your plugin does anything visual, be ready for a lot of beginner questions. Some of your non-paying users will be the hardest to please, especially in WordPress land where you as a (real) developer will be severely underappreciated.