depression? help

emily • 21 - queer - she/her
I've been generally feeling bad. Sometimes sad, most times like an empty shell, accompanied by these /intense/ feelings of failure no matter what i do. i originally thought these were leftover feelings from a breakup that happened in september, but i now realize i have had these feelings even longer than that. they have been unbearable lately. I talked through them a few nights ago w a friend and she suggested I may be depressed and that I should look into seeing a therapist. 
i have 2 questions: how do i go about being a therapist (i am 19 & on my mom's health insurance)? and if i am not able to, how do i combat these feelings? i think it has gotten to the point where i really need help, but i'm not sure what to do. it gets in the way of trivial things, like changing my clothes and going to school. i failed 2 classes this semester just bc i couldn't go to school.... i feel terrible