I will answer, if I may:
Although learning any specific part of the didache or doing a specific work such as confessing or being baptized in water is not God's requirement for salvation, a person who does not “hunger and thirst for righteousness” (MT 5:6) or want to learn “every word that comes from the mouth of God” (MT 4:4) fails the self-examination Paul commanded (2CR 13:5) and Jesus implied.
If we truly believe in Jesus as Christ, the One who represents God the Father, then we will also accept Him as Lord (LK 2:11). When we truly accept Jesus as Lord, we will want to please Him by doing His will (MT 7:21, EPH 5:8-10). Learning the manifold teachings or doctrines describing God’s moral will takes a lifetime. Thus, the need for perseverance/loyalty/remaining faithful, which is as easy or simple as an act of faith.
Paul taught the importance of continuing to learn God’s Word (LGW) in 2TM 3:14-17, saying “Continue in what you have learned and have been convinced of, because you know those from whom you learned it, and how from infancy you have known the Holy Scriptures, which are able to make you wise for salvation through faith in Christ Jesus. All Scripture is God-breathed and is useful for teaching, rebuking, correcting and training in righteousness, so that the servant of God may be thoroughly equipped for every good work.”
Another passage teaching this truth is Colossians 2:6-7: “Just as you received Christ Jesus as Lord [kerygma], continue to live in him, rooted and built up in him, strengthened in the faith as you were taught [didache].” There is no qualitative difference between faith that accepts God’s saving grace at conversion and faith that accepts God’s working grace while walking/living (EPH 2:8-10, 2CR 5:7), but only a quantitative difference as each additional moment passes–and of course faith remains non-meritorious during the saint’s entire lifetime.