Not sure about that even.. in my late teens I worked fast food and as a clerical temp worker (I could type fast) for data entry/processing. The fast food job didn't have an issue scheduling me just in the evenings/weekends.
A lot of employers are pretty understanding if you have multiple jobs and will work around your needs as much as possible.
>in my late teens I worked fast food and as a clerical temp worker
Yes and the world you experienced decades ago doesn't exist anymore.
>a clerical temp worker (I could type fast) for data entry/processing
Rarely available as a job anymore in the US. People in other countries can do it for cheaper, or local people who are so thoroughly disabled that it's legal to pay them almost nothing just to give them something to do as the government pays them to survive.
"Just walk in with a firm handshake" hasn't been a thing in forever.
>A lot of employers are pretty understanding if you have multiple jobs and will work around your needs as much as possible.
No they wont, because they can just tell you to deal with it or find someone else.
If you aren't willing to take exactly the hours they give you, exactly the shifts they give you, or figure out how to cover those shifts yourself, they'll just stop giving you hours and pay someone else.
Even if you have a friendly manager, corporate will fire him if he isn't pushing you hard enough. First level "managers" don't even get to manage anymore, they just follow whatever policy or some algorithms tell them they have to do.
A lot of employers are pretty understanding if you have multiple jobs and will work around your needs as much as possible.