I've read that there is a lot of walking after you go down from the cable car of Yellow Mountain?

1. No, you don't need to be very physically. Most people can climb the mountain easily even if they don't take the cable car.
2. You can take the cable car from Ciguangge and arrive at Yupinglou directly. And actually, Yupinglou is considered the summit area. So don't worry.
3. The previous weather statistics show that the temperature may range from 50 F to 60 F at the beginning of April. It may cool. But it would be a little bit cold on the top of the mountain. You are advised to prepare jackets, thick long-sleeved shirts, pants and sports shoes. Have fun!