The best thing to do to learn is practice. Start small and build up from there. Use the simulator to learn about flight planning. Give yourself a task. Do it. Figure out what went wrong. Repeat.
There are people who will take your money all over the place to teach you. We have our quick start guides but they are pretty minimal and assume you sort of already know what you are doing. YouTube is a great place to start but nothing beats hands on experience. Map your house. Map your neighborhood. Map some roadways. Map a farm. They are all different. Once you have the general categories mastered it is easier to make adjustments as needed.
Sadly, the processing is not generally free. We allow for the processing of up to 333 12 megapixel images for free to help people learn. You can get a lot done with that.
Map Pilot Pro is set up in such a way that it won't let you make too many mistakes. I am a terrible pilot when flying manually. I can generally get the aircraft back to the ground safely. In general I use programmed flight tools 99% of the time. It is called a "drone" after all.
Droning is not easy business. As with any business, it takes a certain amount of salesmanship to get out there and meet people and find out what they need.
Mapping is a good place to start.