On the side of the shower opening that will support the door, hold a jamb piece against the wall so that its lower end fits into the base track. Without moving the track, use a 4-foot level to adjust the jamb until it's plumb. Stick a pencil through the jamb's screw holes to mark the wall.
I was asked to answer, so I'll give this my best shot, please know that I do not have any specialized or trained medical knowledge, only practical experience from Ashtanga yoga and meditation. So, yes, walking does reduce anxiety. 1.
In addition to burning fat and calories, walking builds muscles. The reason is that walking builds, shapes, and tones muscles of the legs, hips, and buttocks. Walking also boosts the strength and endurance of those muscles, which means you'll be able to do more with less fatigue.