Hello Justplz What Randall said. You seem young, so I'm not exactly sure from what angle to approach the dream. How about some questions ...
Are there difficulties between you and your mother? Did/does your eldest sister have the same issues?
Is there something specific you want to do that your mother does not?
Are your parents together?
The drinking may be symbolic but, does your mother drink a lot? Do you, or have you been?
Is there something on your mind that you do not want to think about?
There is something you are concerned about, what is it? You have a "plan" about what to do, what is it?