Pixhawk - cube+ - here 3 programing

Thank you for letting me join, I am a new member and look forward to leaning about them. I have purchased a S500 drone kit and a Pixhawk orange cube+ set up with Here 3. I have downloaded Mission planer and have tried to program it but have nor been able to do it. I seem to always run into a problem, and it does not work the way I am instructed it would.
Is there a live, hands-on course available for this. I am located in the Chicago area. If there is not a course for me to take, is there a business that I can send my set up to and they can program it. Or maybe a business that I can hire to walk me thru it.
Thank you