First start with blog, if your the lazy type hire a writer and pay him for each article and update your blog daily weekly or when ever you have time.
Following this, if you succeed with the Blogs i would create a forum as second project.
I have owned and operate forum in the past and i can tell you, You need first a crowd of posters before you start even to think of purchase any script.
Starting a forum in your case = Kiss of death or you will lose LOTS of $$$ .