How do you move on to Frame 2 & make slight changes to your animation?

[YoMomma]

Okay, so I’m new to Adobe Animate. I’ve just animated the first frame of my animation. All of the beginner tutorials I’ve watched on YouTube are quite terrible. How do I go to frame two and slightly alter my animation, like make my character’s arm slightly raise or something along those lines?

[ClayUUID]

You insert a keyframe.

https://www.youtube.com/watch?v=k4wytvfxXIA

[Nicktendo28]

Here are the Animate keyboard shortcuts. This will help get your way around the timeline easier. 

https://helpx.adobe.com/animate/kb/animate-keyboard-shortcuts.html

[YoMomma · Accepted solution]

Okay. So the answer to my question was either press "F5"...or "F6" & turn on "Onion Skin". Not sure if I need F5 or F6 because I'm still pretty new to Adobe Animate. I have no idea what a black circle, a transparent circle, or a transparent rectangle indicates. Hopefully one of you will be kind enough to explain the differences to me.