New to Wicca

Hey! My name is Hope, and I just found out about Wicca existing in December. The more I’ve learned about it, I feel drawn to it and it pulls me more than other religions ever have. I’ve recently decided that I was going to practice Wicca, but I don’t have very supportive parents and I don’t know how to get stuff for an altar or to do rituals to celebrate the holidays or to even show that I’m celebrating on the Holidays. My sister’s birthday is on Yule so that one I have covered, along with Samhain falling on Halloween (which has always been my favorite holiday) Do y’all have any advice for a baby witch who can’t practice out in the open?