So I have been watching these videos all weekend. I am really liking all of the options available here. Say though if I know for sure I want to do the Customer Service Job, can I go ahead and make my profile of upwork and freelancer and keep doing the videos to see if i want to also try something else? Or do i have to wait until I get through all of the videos to start anything?

are these platforms that we have to pay for ourselves to use or is this software that the clients will use that once hired, they will send to us to use for their individual companies?