DBfinley-
It’s an income, and it’s in finance - albeit entry level and not on the side of the biz you want to end up on. If it’s all you can get at this point, go for it. It’s more than respectable to take a job instead of sitting around insisting reluctantly that you’re “better than [job x, y, or z] because you have [whatever qualification].”
You’ll be working and learning, and at least be closer to the industry than you are now. You’ll make some contacts [probably not lots] and you’ll have some kind of story to tell.
The one caveat I would give you is, if at *all* possible, LET YOUR PROSPECTIVE EMPLOYER IN ON YOUR CAREER AMBITIONS. If they’re on your side and willing to help you towards that path, then that’ll make it a little easier, I suppose, to try and move to credit analysis, etc. But if you just plan to be Clark Kent in a teller’s uniform, the odds of your employer proactively tapping your shoulder and asking you to be credit analyst Superman are pretty low - even if you’re killing it in your current role.