Welcome back, the hunger for knowledge is real 
The Kabbalah, magic and the great work of self transformation was the book I started with when starting my ritual training. It’s very helpful, so I hope you will get a lot out of it, too, as it provides a structure for you to build from based on the A.A. curriculum, or that is what it claims. I can’t say for real as I’m only part of the O.T.O, where we work with reading lists.
So what path has your main interest now? I’m personally someone too who has both worked the RHP and LHP, but the term middle path sounds so …middle.
For energy work I like Nicky Scullens work, Alchemical Healing and she got some other books, too, also I love the work of Debra Katz, but if you want to be serious about it, starting with reiki certification would help a lot, as you will get attuned. (I know you do not need certification to be a healer, but if you have no experience it helps a lot to have a teacher and to set up a good structure/basis.)
I’m certified in reiki(master), crystal therapy and Brazilian aura surgery, but I’ve learned about many other modalities on my own, having the earlier structure made that possible and easy, writing my own book on healing currently in combination with the darker energies and forces of life.
I feel there is still so much to learn though, there is so much possible and eventually just as with rituals you create your own cleansing methods, but the style is ever evolving.
Naturally I am attracted to darker stuff so spellwork and general witchcraft is a big part of it for me, I believe the strongest healers are the ones that are able to curse because how are you going to remove some heavy curses if you only know love and light healing… Unfortunately I have seen many professional energy workers in my circle getting into serious issues because they did not want to acknowledge they were being taken up energetically because of lack in knowledge and gaps in their protection, still doing daily work on unsuspected clients.
Removing energy is easy, you can do that in a matter of seconds, the difficult thing is, keeping people protected from the energy entering again, which needs real skills as well as the psychology behind why and what they attracted. Developing the clairs are a big part of it, so you can read someones energy field.(Debra Katz has training on this)
A lot of healers nowadays aren’t really healers, they are more cleaners of something they can not even sense/see, but we all know cleaning is very temporarily, to clean well we need to see what we are cleaning, and we need the tools to keep it clean too, if not, worse can be attracted by the person you are healing, especially if they did not become conscious of what was in their field. So energy healing goes hand in hand with psychology/ shadow work but also with the physical body. Illness can be read in someone’s energy field 2-5 years prior of it manifesting in the body, but also working with fields of others filled with illness can bring your own field in danger, and you then absorbing their illnesses is a real thing. I once read that it is why many advanced healers actually become crippled or worse, die of cancer, even back in the days, as this accumulation of energy was not cleansed and banished well enough in themselves and they did too much for others, so remember you always come first when it comes to healing work, never work when you feel tired or feel like you need a nap or cleanse and it is fine to deny people your work, too. When I just started out I made many mistakes, I cleansed people who I knew had curses on them placed by magick I did not know about, this then got me very sick for weeks and they moved on feeling so great, eventually I fixed it, but this was not something I needed and the risks are not being spoken about enough as it is seen as negative and people tend to focus on the positive in the healing community…
If you follow along with your plans of books and combine real energy work/magic with healing then it seems to be going the right direction, so good luck.
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