Basic Joomla setup, with a file download category structure

Assistance is need on getting a small Joomla site up and running. I already have the site up and running, with a basic template. But I am stuck on the details of setting up news section to work correctly and setting up a basic structure. See attachment for existing template. The site is not intended to be overly complicated. Only a news/blog style of resource. I need the site to have 2 functions. First, the news posting feature, as already included Joomla. The other function is a download file structure. Nothing too fancy, I just need a structured download system. Where I can break up categories such as demo, game, tutorial etc... Then inside of each category, files can be listed with short descriptions and a download link in each section. I know many great add-ons exist for Joomla, So if there is an exiting solution for a download file structure system. Free, or even if the add-on has a fee, I will pay for it (pending it doesn't cost an arm & leg!) Either way, I am still paying you to set it up. I am easy to work with and have been on both ends of contracts. I am an artist by trade, so visual items of the site can be handled by me. Unfortunately I am not skilled enough to get the site setup the way I need it, so I came here looking for help. This is my first time using this GAF, so I thought I would try something simple first. Thank you, and happy bidding!