Piggybacking here based on anecdotal evidence. My experience with hallucinogens has been invaluable to me, especially as of late. I found myself in a completely new place in life many months ago, where I was completely independent for the first time in my life. I felt this was a new start to my life, yet I was very nervous of the foreboding failure I've seen plague my friends who went through similar experiences. I've seen many people turn to opiates/benzos and completely lose control of the (seemingly) stable personality they used to possess. I was pretty nervous to try "hard drugs" for the first time in my life, but a close friend asked to take LSD with him. I wouldn't call him a stereotype of people who believe in the therapeutic qualities of psychedelics, but he, and many other people on the internet, told me that doing acid the proper way can be a very impactful experience on your life, for better or for worse.
Since my experience with him, I have also tried shrooms and 25i a handful more times (2 times each). Each and every single time I step out of my reality and journey into my mind (I know how dumb that may sound but upon your first experience, you will understand what I mean) I have emerged with a greater understanding of the type of person I want to be. Yeah, of course it's fun to sit around and look at the clouds and trees changing colors. As a huge fan of all types music even prior to psychedelics, I couldn't even imagine how incredible music sounds while tripping. But like smoking weed, those things are only fun during the high, and you won't wake up the next day with anything gained from just that.
If you choose to undergo this journey, as long as you go in with a willingness to submit to whatever your psych wants to show you and a positive headspace, you will gain new understanding. It may not be about what you expect to learn. I've found that going into a trip with the goal of comprehending a situation in my life, I personally have found little to no success (note: your results may vary. This is entirely anecdotal). I let the drug show me what my subconscious has been doing all this time. It may be something you've long desired to understand, it may be something horrifying, or it may not even make any sense in this reality at all, but the point here is that you became more in touch with what is within you, around you, and across the Universe.
One of the most bizarre experiences with me was on 25i. I was on a peaceful comedown late in the afternoon after my first morning trip when my ex girlfriend decided to stop by to talk over our recent breakup(I did not reveal to her that I was slightly under the influence of a weapons grade narcotic, and oddly enough, she didn't notice). I'll spare you the details, but talking with her and discussing out issues we had together became a whole lot easier than mere "I don't knows" or "I'm not sure how I feel." On psychedelics, all you can do is feel. I was able to relate my problems with her to issues from my past with incredible recollection and an uncanny way to express to her how I felt about certain things she did. I do not condone using psychedelics, however, as a way to work things out with an ex. I think this worked better merely because I was on the comedown.
Hands down, psychs have provided the best experiences I could have ever asked for. However, do keep in mind that it is simply a drug. If it was truly life-changing or fixed every problem in the world, it wouldn't be a schedule 1 substance. The best thing you can do post trip (or even mid-trip if you possess the ability to form coherent thoughts) is contemplation, meditation, journaling, drawing--anything that helps you draw between the world we all live in and the world that you'll be taking occasional trips to. You'll learn a hell of a lot about yourself and why you do the things you do, but only if that is your goal from the start. Happy tripping :)