Should I move out?

I'm currently a senior in high school, and I'm considering moving out once I turn 18. I know that it's very risky, and there are a lot of potential financial issues and problems, but my family is very toxic and my house has become a very unhealthy environment for me. My dad and my step mom never support me and they always bring me down. For example, I recently took my senior portraits and upon getting them back, both my dad and my step mom immediately proceeded to badmouth my photos behind my back, saying things like, "It looks strange, why did she smile like that," and, "They look bad, she shouldn't have smiled like that. Why didn't she do this? She looks bad." They never support me, whether it's verbally, emotionally, or mentally, and they constantly bring me down. They constantly make me feel insecure, stupid, and unwanted.

Several years ago, my biological mom passed away, and I entered a state of depression for a few years. My dad did nothing to help me. He saw me distancing myself, becoming more quiet, and not practicing good hygiene, yet he labeled it as me going through "a phase," and he often reprimanded me for acting so "emo" and "sad." I often cried myself to sleep, or I would cry for hours at night by myself because of how alone and lost I felt. When I was younger, my dad would excessively yell at me and "spank" me (that's what he called it, but he would hit me on my hands, arms, and bottom) as a form of reprimanding me, and I've now become scared of him. Whenever he reaches his hand out towards me, I flinch away. I don't feel comfortable talking to him about anything and I just constantly feel like I'm walking on eggshells around both him and my step mom.

In general, my dad never supports me; he always questions me, pressures me, talks badly about me behind my back to my step mom and younger sister, and he has the mindset of "you're lucky I'm only punishing you like this, I had it worse with my own dad." My step mom judges me and doesn't support me, either. I feel trapped in my own house, and I constantly just feel put down by them. I've tried talking to my dad about a few of these issues, but nothing has changed (and I won't even bother trying with my step mom).

I would be significantly happier and healthier (mentally and emotionally) if I was able to move out, but I'm not sure where to start. I currently have a job, but because of the current pandemic, I haven't earned money in months. I'm slowly saving up, and I've considered moving in with roommates in order to lessen the cost of an apartment. My parents pay for my car and my phone, so I'm not sure how I'll be able to support myself in those terms. Paying for university is also a significant factor, as I plan on applying to well known universities.

Is this a good idea for me? I constantly feel put down, anxious, and afraid in my own house, and I don't even feel like I have parental figures I can go to whenever I need help. Am I overreacting? Is it not even worth it to leave?