Need Apple-based Productivity and Organization Expert

I run a small company. I need someone to teach me how to use concepts from Getting Things Done and "Building a Second Brain" by Tiago Forte. Open to suggestion for the simplest possible system. For example, Evernote, ToDoist or Things, Fantastical, Apple Notes, Instapaper, or whatever you recommend. I'd like someone experienced with these types of programs and concepts and who is a patient teacher to help me create a good, easy to learn productivity and task management system for personal use. 5-20 hours of work initially with the possibility of ongoing part time assistance with Mac and IOS as well as SEO related ---------- your response, please tell me specifically which programs you use to Capture, Organize, Distill, and Express to be organized and productive. Top candidates are those familiar with concepts from Building a Second Brain and GTD or a similar approach. Be sure to use the phrase "building a second brain" in first sentence of your response, so that I know you've read this carefully, thanks.