It is pretty far out. I'm working on the fringes of the healing profession myself and have known many people here in the Czech Republic who worked with the angel energy. For years I approached it with the "yeah whatever, the as long as it works, bring it on".
Then one of them took me in for a session, no money required, all very positive. At some point she called in Archangel Michael to "cut off the negative connection" which I objectively had. I was shaking and all kinds of energies went running through me.
"You know, he's got the sword, he's good at cutting stuff off you don't need anymore." Well, I must say that it didn't expect the slashing of his sword through my guts to be quite so powerful. Wow.
Then it was over and my body experienced complete peace. I noticed that the area we were healing was the only one in my body that didn't hurt at all, meaning I could notice small aches and pains in my back and joints and all the usual and there was complete pain-free peace in my belly. I was about to take painkillers prior to this healing and didn't have to take them since.
I was made to believe in angels because they sort of showed up and their presence was so powerful, that I'd be absolutely nuts to try to deny it. I've had several amazing sessions since, solving energy clots that were tied to my late grandmother, my childhood and many other things that would be hard to identify otherwise. Many of these issues weren't even mine. They were something I sort of took on and held on to on the subconscious level, which then automatically translates to physical discomfort and later on to illness.
As for my therapist or choosing a therapist, go by personal recommendation. These people either have the connection or they don't, in which case they're just charlatans. It's about personal openness to the spiritual realm which we can all achieve, but it takes a whole lot of work, so mostly we don't. If someone does keep their channel open, wow, more power to them and yes, then they can definitely help you.
But going to school for something like this or being certified is pure crap. I'm sure there may be courses or apprenticeship type training for the practical aspects and some information to be passed on to novices, but you can't teach having a connection. That's a gift or something you gain through long-term rigorous self-discipline and honest work on yourself. And no school can provide that.
I have some pretty extensive training in meditation and self-awareness, so I'm sure that could play a role. I'm not used to believing in things, I just experience them and if they work, I keep them. In other words, I prefer to know instead of being told and then believe.
So, the experience with angelic healing was just like that for me. The universe sort of said: "Here you go baby, this is how it works, deal with it, wrap your mind around it, but stop denying it, because it's there." I also had several people tell me to go to the next level, so I approached it with a completely open mind and had no prejudice. I said to myself "I'm ready. Whatever is supposed to happen, will happen." That certainly is an important attitude in a healing process like this. Good luck.