The first step in learning Tantra is to cut your nails. It is impossible to give a good massage with long, large nails. Long nails can hurt your partner.
As for Tantra books, the only good ones are those that show explicit sex scenes.
Tantra can be divided into two parts: lingam (penis) and yoni (vagina).
If you are a straight man, learn yoni. If you are a gay man, learn lingam. It's that simple.
‘Yoni Massage: Awakening Female Sexual Energy’ (Michaela Riedl)
‘Mastering The Art Of Vaginal Massage: A Man's Guide To Giving Your Lover Ultimate Pleasure’ (Dr. Leonard McGill)
These two books are good for straight men. These two books show only yoni massage.
The practical guide to tantric massage: for couples ( Deo Prem)
Ultimate Erotic Massage: Sensual Techniques for Enhancing Sexual Pleasure (Kavida Rei)
Erotic Massage: The Tantric Touch of Love ( Kenneth Ray Stubbs )
These last books show both yoni and lingam massage.
Another way to learn Tantra is to buy video courses. Yes, they are videos of masseurs( massage therapists) having sex. But it's not pornographic. It's sex education.
In Brazil, the two best Tantra courses are Márcia Carvalho and Joyce Gumiero .In English, the only one I can recommend is Hunk Hands. In English, that's the only one I know of.
Remember that tantric massage can be applied to anyone, regardless of religion. Tantra is based on human anatomy.
The only way to learn this sexual art is by watching explicit sex, erotic content. Tantra is not just a philosophy, it is a practice.
And I suggest learning squirt massage. Women love squirt orgasms. Female ejaculation is extremely beneficial.
Blocking ejaculation( or the orgasm) has never had anything to do with Tantra Yoga.
In Tantra, men learn Kegel(PC floor) exercises that can delay ejaculation, not block it. Women take longer to reach orgasm, which is why all heterosexual men should do Kegel exercises.
Furthermore, if a man receives a lingam massage(or oral sex -blowjob) from his wife , he will have orgasms + ejaculation. This is normal.
Nofap is designed to keep men ignorant about sex.