Any advice?

Hi i'm 18 and today was the second day of my new job. And i know it will get easier but i feel a little overwhelmed by it. Not just that,. I just feel like i have to help my mom pay bills and it's just heavy on me right now cause I don't want to let my family down.

I came back from work so tired and well it's normal but i feel like how am I gonna get anything done like that?

I was planning on getting a second job but now i dont know how I'm gonna manage.

I'm just a little overwhelmed and i would appreciate so advice or words of encouragement.

I know i have to grow up but i feel very lost all the time.