Yes, indeed! Your book "The Mysteries of Mithras" is very useful here towards understanding what Mithraism is all about. Both the historical version of the phenomenon and the Mithraism 2.0 imbued with Zoroastrian philosophy we are discussing here.
I guess I should add my two pence :)
The Mithraic revival is only around 100 years old max, so it doesn't have the various bagges that comes with more established traditions.
Its also means you have to think for yourself more (no easy answers) and have to actually expriment to see what works and what doesn't in making contact. so generally more organic and interesting, and generally something that people get interested in while they have been doing spiritual practise for a while.
My own approach is covered in my books:
The Mysteries of Mithras: The Pagan Belief That Shaped the Christian World.
Followed by Stellar Magic: A Practical Guide to Performing Rites and Ceremonies to the Moon, Planets, Stars and Constellations.
And ofcourse Mithras Reader Vol1, Vol2, and out this week Vol3 at the fullmoon on autumn equinox, in honour of Mithra and forthcoming Mehregan festival).