Pick a simple goal or idea for your AddOn. It's often a good idea to just make an AddOn that only opens a window or prints a message to get started, especially when everything is new for you. After that works the way it should, and you have learned everything necessary to make an AddOn work at all, you can move on to adding one piece at a time toward your goals. Writting software in general is often a never ending process because you can always think of something new to add or improve.
Tycoon is a shady company that is simply trying to get people to buy an addon that is a 'lite' version of a free addon that is actually better (TSM). The company behind it buys dislikes on YouTube videos from other 'gold-makers', refuses to offer support if, for example, your computer crashes and you lose your addon (you'll have to buy it again), and pays random people to praise Tycoon on YouTube with no personal use of it at all. Overall, just stay clear of Tycoon and any of its affiliates.