Amanda Bynes is getting her steps in! On Wednesday, October 23, the Nickelodeon alum, 38, was spotted taking a walk on the streets of L.A. The actress — who recently debuted her clothing collaboration with designer Austin Babbitt — wore a white T-shirt, black boots and gray leggings on her stroll. Additionally, the star — who has repeatedly changed her hair color as of late — donned her bleach blonde locks in a slicked-back style and had long nude nails. The Amanda Show alum accessorized with a backpack and her silver septum piercing. As OK! previously reported, on October 2, the celeb reveale…