If I were starting over, I would first do the most important thing - log in every day and complete my ToDo list. Some of the basic tasks starting out are worth reviewing until I actually remember them.
Then I'd take some time every day exploring more of the training that's available. I've had a lot of experience on the internet, but there is always something new to learn here.
I'd start building my team right away, using the coop at least until I have more experience.