About how many Christians believe in the Marian teachings, Protestant make up about 1/4 of the world's Christians. And of those there are those who do hold to the Marian teachings regarding her immaculate conception and her perpetual virginity and her divine motherhood. So no, we cannot lump all Protestants together into those who do not hold to any Marian teachings, nor are Protestants in the majority. I do not place JWs, Seventh Day Adventists or Mormons in the Protestant category since they are not Christians ecclesial bodies but are heretical.
Hello Agent! I know you feel alone in the parish, so allow me to tell you a secret of the saints (note: this isn't secret knowledge, just something a lot of people tend to forget or not understand).
Whenever the saints wanted something done, they started with themselves. Reform, charity, devotion, etc. always started with them. The same goes with communities and movements. I advise you to start a group, like bible study, Eucharistic adoration, or a Rosary a day. Whatever devotion attracts you, practice it and recommend it to others. You will soon gather friends, people who share a devotion with you. I highly advise you to always remind these friends that, while your common interest is a devotion, your communion and unity is Jesus Christ, and therefore, together, you must live in Jesus, and in living in Him, seek a greater union with Him. We unite ourselves to Him by prayer, charity, and the sacraments, ultimately Holy Communion. So in whatever devotion you practice, keep your gaze on Jesus.