I’m not exactly sure what you mean by the first: Marian devotion is simply that, devotion. As the mother of our Lord and Savior she was the first to see Him, the first to care for Him; she saw His first smile and His first tear. . . .
That being said, particular devotional practices are optional. Totally. You need never be a ‘devotee’ of Mary. You need never say a rosary, or read about an apparition. While there are some (by no means all) apparitions which the Church has agreed were both supernatural and not in conflict with Church teaching, even so, YOU personally don’t have to know about them, talk about them, or think about them.
Possibly as a Protestant you felt more ‘drawn’ to one of the evangelists. Some identify with Luke, some with Matthew, some Mark or John–of course, some are drawn to Peter or Paul. . . Usually, there is a writer whose words you ‘like’, or ‘understand’ more than some or most of the others. Well, you’re not putting them on a par with Jesus, you aren’t even putting them in competition with each other exactly, but sometimes you feel a kind of ‘kinship’ with a particular soul.
So with saints–and Mary is a saint–sometimes a saint’s life will ‘speak’ to us. Lots of us mothers relate to Mary–or to her mother Anne. . .or to Monica, mother of St. Augustine. Animal lovers tend to enjoy hearing about St. Francis. You get the idea.
None of those people take the focus away from Jesus, though. It’s just that knowing about them, praying with/to them, if we have some of the same circumstances in our lives, it makes it seem ‘easier’ in a way to ‘share’, and some of the things the saints did to make themselves saintly for God are things we can do. Ultimately, the aim is God–His love, loving Him.
So ultimately, devotion to Mary–His mother–is greater devotion to Him. We’re devoted to her BECAUSE we’re devoted to Him, not the other way around as so many seem to think nowadays. Jesus is the root, the sun. . .Mary is a flower, a moon . .You can’t have a flower without a root, but you can have a root by itself. You can’t see ‘light’ from the moon unless it comes from the sun FIRST.