It seems that sharpening the heels and legs when walking is not very straight. ask for advice

That should be the inner character. This is not a simple posture problem. It is the lack of exercise of muscles, especially the muscles inside thighs and calves that have no strength. The longer it takes, the uglier it looks. It is suggested to increase the strength training of legs and watch some sports videos, that is, lift each leg in all directions, 50 times in front, back, inside and outside. Persistence will have an effect! If the arch is not obvious at the same time, you need to exercise the strength of your ankle.