Well, Im not really a how-to-animate channel, but I'll definitely share tips on getting better. The way how I did this one is by replicating the keys of the animation and then replicating the animation from the actual animation clips. A database I would recommend for doing this exercise is https://www.sakugabooru.com/ . I would just pick a clip that seems really cool (nothing too hard for the first one) and then replicate it until you are satisfied.

But if you got any other question or want some help just private message me, It wouldn't be problem for me to help out!