Yes you need to pay admission fees for taking the course , product or services.
Yes you can take this course or services from your home only because it's is a online process.
There's not much requirements you will need for doing this Courses you just need an electronic device like a mobile or a laptop, a steady internet connection.
It's not a work or its not a job it's only a learning and earning process you need to join here as a learner besides of learning you will be able to earn selling some courses goods or services.