Hey there, killerachilles. I imagine that now, more than ever, is a really rough time to be home with people you live with and not out. I hope you're doing okay overall. I'm sorry that you're having a harder time with dysphoria than usual.
We have a really good piece from someone who's also trans about coming out that I think might be a particularly good one for you to read: Becoming Out: A Totally Non-Exhaustive, Step by Step Guide to Coming Out
In general, do you *want* to come out to your mom? Do you think she'll be supportive? What would you be looking for in coming out to her? Do you think she could meet those expectations?