Hi, sorry for the late response.
My experience has been, at first, was traveling near my home. Eventually, roaming farther. As far as altitude goes, it takes a lot of concentration to get into the projection. Use your mind to go where you want. Try flying onto your roof top and sit there watch the surrounding areas. When you want, try jumping onto your neighbors roof top and view the area from there. If you want to go "high", how high is high? Maybe try flying in a Real Time Zone projection around your home at about 50 to 100 feet. Work from there. Sit at the top of the atmosphere. Work from there!!! Good luck !!!!
Grant