I learned the entire system in less than two days. It's about as complicated as warframe itself is for newer players. And as with everything in this game, the internet is your bestfriend when it comes to learning how different things work. In a worst case situation, just find squads to join in railjack missions. It's a great way to farm components as well as dirac. If you're simply using railjack to gain mastery, continue doing that and slowly level up intrinsics. If you're looking to farm certain items such as the Tenebrous Ephemera... figure it out, and learn how to solo Veil missions solo,