hey! so i wouldn't text anything, as that's not seen as an official form of communication. i would recommend writing a letter that says you're quitting; be sure to list your last available all date. all you need to say is that you're quitting and the date, a reason is not required but you can give one if you choose. it can truly be as simple as "i would like to give my formal notice. the last day i can work is \*date\*." then email that to your manager! it would also be a good idea to print out the letter, and bring it with you to your next shift where you'll see them, and just have a quick conversation to touch base about it.

It doesn’t hurt to add a thank you to them and the other staff for your time with them and what you’ve learned. It’s always best to go out in on good note so you can ask for references for jobs later.

A text is fine..

I just put in a notice, I did a 1 on 1, and she was annoyed cuz she’s loosing like 5 other people, but she just said she’ll stop scheduling me

Wrote a letter.
It doesn’t hurt to add a thank you to them and the other staff for your time with them and what you’ve learned. It’s always best to go out in on good note so you can ask for references for jobs later.