In addition, I need to find out about renewing my FASFA form.  In a hypothetic scenario, how would I do a renewal to change information on my form?
No problem. Just Login into your account and select FAFSA renewal once there. It all will develop  automatically.
You mean i just sign in there after that, all i have to do is submit the form?
That's correct. Only log in, sign after you filled the form and submit.