First, here's a useful guide as to the order and contents of an academic CV.
For someone new to doctoral study:
I would say start with education and list both your current program and your previous one - include GPA from the previous program if above, say, a 3.0.
You can be pretty liberal in terms of what you include under awards - any merit based grants or fellowships you were awarded in this program, any merit based awards you got in undergrad (you can remove the undergrad ones once you're further along, but for now you can leave them in). Don't include need-based awards unless there was a merit component.
You can include any research experience you had in undergrad - you might remove this later - but for now I would put this in - research internships, working in a lab, that sort of thing.
You can include professional skills if they are a requirement for your field - like being familiar with a statistics package or other software that folks need to know. You'll probably remove these later, but for now this would be good since professors looking for a TA or research assistant will look at your CV and want to know that you know how to do what they will need you to do.
Languages - if you know a language other than the one expected for your program, include this here.
And then professional affiliations - I would join an organization or two in your field and then list your membership on there. Maybe talk to a professor and ask for a suggestion as to what they would recommend joining.
It also really is okay if you have a short CV when you're just starting a doctorate. They obviously chose you based on your aptitude for the program, but most people come in with fairly short CVs, and that's totally expected.