Anyone with a faceless channel, what are your niches? How long do you spend on editing your video?

Hi, im starting youtube a month ago, mostly is me sharing knowledge about books i have read. I dont have filming skills so i dont put my face out there. I tried different alternatives, like putting simple animation, stock video or slide instead. Im not sure if this method will works, and it takes me quite too much time on animation. What are the effective ways you have tried?