Red tantra is not so much about the destination as it is about the journey. Procedures and manipulations have evolved over perhaps thousands of years and focus on a giver and a receiver who can alternate these positions during a session for a shared and equal journey. Most of the procedures and manipulations can be adapted or adjusted for a solo journey (as I have done). Your preparation for relaxing the anus (sphincters) is accurate and your description of how to insert a finger and what to do with it when it is inserted is also accurate. But tantra does not begin with the first chakra. The first chakra is where you channel energy from the seventh, sixth, and fifth to the fourth or heart chakra, and connect them to the second chakra — the wand of light — via the third before transferring it to the first. I always used one or two fingers to dance on my prostate, and could short cut the entire process by achieving sensational orgasms without stroking my cock and ending in either ejaculation or inejacuation. Short cutting as you have described provides a great experience but I assure you though lengthy the more orthodox tantric procedure is more rewarding — by the extraordinary pleasure during an for a long time after, but the great sense of who you are, self appreciation and your entire sense of being. Dorje