Welcome to the platform Ijeoma, here are answers to your question:
1. The courses here currently cover AutoCAD and Fusion 360 software and after the courses, you can make electrical, civil, mechanical drawings. There are no courses on AutoCAD vertical software like “AutoCAD electrical” and “AutoCAD mechanical”.
2. With one subscription you get access to everything including ebooks there is no additional purchase or addon required.
I hope this answered your question.