I feel like my family is going to tear apart, How can I help my family without them seeing a psychologist?

I am a senior in high school, under a lot of pressure, my brother has ADHD and my sister is in the direction of having an ocd or something like that- I am not feeling comfortable at all, I need help, I think my mom has menopause since she screams a lot, gets angry and frustrated easily, and my father is a hardworker but makes mistakes. I don't want to blame anybody from the family or put pressure on them so they won't blame themselves or have a psychological disorder, I want some tips or help with how to deal with it so my family can get better, anybody can help me please??