Can I ask gently was it the first time and you got caught, or had you done it before and just this is the first time you actually got caught?
I think it’s important to understand why you did it. Was it greed, did you desperately need the money?
you don’t need to tell anyone why you were fired, but you do likely need to say you no longer work there, say something like a number of people let go due to costs or something. You don’t need to admit you robbed them. But explaining you no longer work there will give you avenues to get emotional support from friends and family.
have you negotiated a reference with them, as in will they give a basic reference and not mention it, a lot of companies do this to allow the person to stand a chance of being employed elsewhere. We do. You’re not the first to do this and won’t be the last sadly, and everyone we have fired over this sort of thing, and it’s the predominant reason, have all lost their jobs for very small sums of money.
give yourself time to go through the emotions, but try to get back on the horse, start applying for other roles, start thinking of the back story to use why you left. It is important you do not tell potential future employers the real reason.
was it retail or hospitality? I’m guessing it was a cash business. If it was retail or hospitality you will have transferable skills, and can think wider on where you can apply.
so give yourself some time, but not much more, and start looking to the future with optimism, looking for other jobs, and then put this behind you.