I can understand to a point you not knowing how job searching works now, but you seem to be asking because she doesn't know?! Because she seem to lack the motivation, initiative and determination to do it off her own back!
To be honest I find that quite shocking!
She's 18 has she NEVER had a paid outside the home job?!
Not even in the holidays?
If not why not?
And if not, then to be honest I think she's going to find it extremely hard finding work.
My dd is 19 and after some time out working full time she is now back studying, she has 2 part time jobs at the moment which even with a pretty good cv and good refs for her age she took some time to find.
She's been working since she was 14 part time, left school at 16 and worked full time (long story she got put off education for a while) and has now decided to return to studying.
On the job websites like indeed etc there's usually a counter which tells you how many have applied for each vacancy, and that's only the people who've applied directly via that site and often the same job is advertised in multiple places - different sites/apps, newspapers, with agencies, on the companies' own websites (especially if it's a large company like Tesco or next)
And even so the number of applicants per vacancy, per site dd was telling me it's often close to 1000 applicants on the first day they're advertised. I've been browsing for her too and that's what I'm seeing too.
Add in the huge numbers of redundancies due to covid, more coming due to Brexit, I'd be advising her to consider changing course rather than just quitting without a job to go to.
50 applications is actually quite a low number, she may well need to do 100's before she even gets an interview.
Unless of course you can afford to support her?
Am I right in understanding she was privately educated throughout school and has never worked?
In all honesty if that's the case I can't see an employer who wants a "grafter" hiring someone who's never worked a day in their lives and has just quit college, not even a month into the course, essentially on a whim having chosen their course poorly!
Plus there are more youngsters than usual due to the current effects of the pandemic on education meaning many are opting to take 2020/2021 "off" until things are more settled.
But many of these youngsters will have more experience and better cv's than your dd
Warehouse near me decided upon adding 6 temp vacancies, for over Xmas, before they even got around to advertising, purely word of mouth from current employees telling family and friends they had thousands of applications. Those jobs were filled without any advertising even being necessary.
Most of the Christmas temp work vacancies will be filled by now too.
She'll need to be really on the ball and checking several times a day.