Need 2 snappy and smooth animations for a speedrunning game!

Hello, I am planning to make a speed run style game on Roblox, and I want two animations. One animation is when the player starts running in the gam.e, I want the hands to move a bit to the back, and overall movement should be very smooth. Also, for the backflip,for this game I want it to be a quick backflip animation since players are jumping over obstacles at a very fast pace. I just want both animations, to look overall pretty polished (R6, or R15) I tried making my own and they sucked, lol. Contact me, if you are interested in this project, thanks. It is highly preferred if you can send a portfolio with previous works, thanks!