If you are hellbent on getting a woman you basically need to become a scholar at sex. That is because the only thing women have use for men nowadays is sex, if you are not able to give her that you will never ever have a relationship. Mastering oral sex is a given, but even more important than that is to master foreplay. You basically need to become a virtuoso at arousing her mind. Yes, she will still require real vaginal penetration. For that there are 4 options:
1. Simple Dildos.
2. Penis sleeves (or strap-ons god forbid).
3. Thrusting machine dildos.
4. Another man (you have to become an actual cuck, which is not recommended).
But you still have to attempt to give her PIV sex with your actual penis every now and then. If you do not do that she will think that you have no self-respect, which is a major turn off to women. The only sex positions which are open to you at your size is doggie sex or missionary sex with her feet resting on your shoulders. Those are the only positions where one can do something resembling PIV sex with a small penis. Even if she asks you to do another position you should never ever entertain those requests, keep it to those two sex positions. Also, when you do PIV sex with her you need to manage your expectations. She will only be able to feel anything if she is keeping close attention. Only an exceptionally polite woman will feign any kind of reaction from PIV with a small penis. You might even prefer her to give you no reaction than to fake one.
Becoming a cuck is obviously bad but you should never do any SPH-stuff, pegging or similar either. A real freak of a woman will get a kick out of humiliating a man with a small penis like that, but only for a short amount of time. Eventually she will move on to a real man. Besides showing that you have self-respect you also have to command respect from your woman. That doesn't mean that a woman can respect a man with a small penis, no woman could ever do that. But your relationship will fall apart instantly if you never place any demands on her. These threads on r/smalldickproblems are good references for the kinds of words and actions you should not allow:
View: https://www.reddit.com/r/smalldickproblems/comments/8g53ic/what_we_dont_want_to_hear_slightly_updated/
View: https://www.reddit.com/r/smalldickproblems/comments/7hfv5e/language_use_and_penis_size/
Overall I would not recommend it though. If you simply want children and a family then saving up for fatherhood through surrogacy is a better option. There is no love a woman can give you. All you will really end up doing is spending every waking moment pampering some ungrateful hole, who can and will leave you eventually. The life you have now is better than the one you can have with a foid.