Nice intro. Don't feel bad or discouraged about writing a lot or giving great detail. More detail explains your points better and gives others a better view of what your trying to get across.
I feel you on your points about drugs/religion and how our society views them and feeds you their lies. As soon as I was able to start to think freely and make decisions (age 9-13), I stopped believing in religion (at least the dogmatic ones). And then I was able to differentiate between religion and spirituality in my teen years, and able to find my own path. But during that time (early teens) I was introduced to cannabis, and I loved it, there was no negative side effects and it helped me greatly with the anxiety/depression I had. I then began to research psychoactive plants, as I had never liked prescription medication or hard drugs (they do have their place though). So my knowledge on the subject far outgrew others my age, as well as my teachers I found out, the anti-drug propaganda they preached always made me laugh, especially as they drink their coffee every morning, then go home and drink alcohol with a couple of pills. Thus I realized how much our society tries to lie to us and scare us away from the truth, which can be such a great thing.
But amid all this dogma our society pushes on us, the truth seeps through, we learn and spread the real knowledge to those who seek it.
Anyway, 'pre-flight anxiety' is very common. I get it before/while doing any psychedelics now (even mescaline, which the experience is nothing but fun). You just have to learn to let-go of those feelings and give-in to the experience. So far I have come to the conclusion that this is just the ego trying to protect itself by scaring you. There is nothing to be afraid of though, except for that very old saying that goes "there is nothing to fear, but fear itself". Fear is what holds us back, and letting-go of fear is very easy to do, you just have to accept fate, accept what you are experiencing, and then enjoy it. Bliss comes from within, and you must lean towards it instead of fear.
When it comes to psychedelics, especially powerful ones like DMT, 'set & setting' are everything (have you seen THIS yet?). I think this is what is affecting your mushrooms trips as well, after I learned to thoroughly apply 'set & setting' to my trips they have all been wonderful and exactly what I wanted to experience.
Welcome to the nexus.
Peace, and Love.