How can I fulfill my future husband's desire to "master and perfect" marital techniques and fortify him, especially since he is very religious and polite and dislikes direct instruction, and I do not have sufficient marital experience? And are there reliable books that can help me in this regard?

The husband is to be commended for his uprightness, religiosity, and pursuit of knowledge. What he desires from his wife in bed is a legitimate right for both of them, and it is something that protects both spouses from falling into the forbidden. There is no harm in the wife being creative for her husband in bed; in fact, it is desirable as it fulfills the desires of both spouses. As for the husband thinking ill of his wife if she pleases him, this should not deter her; rather, it is a shortcoming in the husband himself if he thinks that way. What is required of her is to learn permissible ways of pleasure from reliable sources.