Yes. Either make new layers and save each of them in order and naming them so you know which animation ur talking about x3 or open a new tab (of paint.net, photoshop, gimp?)and make each frame on a new fresh one. For example, if you want an eye blinking animation, you would probably have 3-4 frames (eye open, eye lid going halfway down and eye then closing. Same with 4 frames, unless you wanna add an extra tiny detail while closing the eye, like bringing the bottom of the eye upwards when the animation of the closing eye finishes)
Really good, but there is more to animating then just simply hair moving back and forth. I'm going to tell you something that may help you out. Animating is more than just making a picture move, it's bringing a living, breathing, creature to life. Animation is a very hard job. Myself, not the best... it takes a lot of effort and time. How I learned is from studying the principles of frame rate. Forget smoothness, it never counted, what matters is weight and volume control, which is what I've been learning about lately, sometimes I like to jot notes down in a journal. As I said, it's a tough job. It takes a long time, I know. I've been practicing for 2 years, it takes a lot of thinking and concentration.. I guess the way I got "good" is from animating from different perspectives and animating several objects. Just keep practicing! I'm hoping you'll get better and better and that your practice will pay off in the long run.
yea i know animating is not really just hair animation, was just testing it thought because i never really done one before. im just basically "feeling" how to animate some parts of a character 1st. ^^" i will start trying on motions soon. But i do have a question, i dont really understand your meaning of weight and volume control. i assume is the animation of how deep the emotion is in or the right timing of the object control?