What you speak of is fairly common in my own readings on things. It's also among the primary reasons I view DMT as a potential tool for improvement over a funky molecule that affords even funkier visuals.
Intent, one of the keywords often offered out, plays a nice role in this. If ones intent is to seek to improve and alter themselves for the better then with a bit of externalized research and study (doing the knowledge before you do the wisdom, so to speak) then one can better set a path to start walking down.
No surprises that best laid plans can go awry and when dealing with DMT this is a given, at some point or another. I feel seeking improvement of ones-self is a righteous use of the molecule and serves as a sound platform from which to dive in. Once one has taken a few journeys and integrated what they can, I feel it is likely that much more will unfold and many new fresh questions will rise up from within.
A good bonus to all this (imo) is that the journey itself does indeed seem to offer an extra "push" towards improvement of self anyways, even long after such initial wishes are replaced by a variety of gobsmacking things to mull over. I guess the main thing to be mindful of is not expecting instant permanent life changing things to happen (definitely not precluding it) and to ensure integration involves not just mental processes but improvement in the physical aspects also (if needed, I know they were and still are in my own body).