How much profit are you making from Amazon wholesale (UK)?

I’ve been thinking to start a side hustle and interested in starting Amazon FBA wholesale. It’s clear to me that in this climate you need a side hustle unless you earn £200k+ annually (my personal opinion). Like you could lose your job, mortgage rates could increase, never mind if you have children etc.

So to those with some success in Amazon FBA:

When did you start? How much profit do you make monthly? Annual revenue? What was your start up capital? Any advice for a newbie? What was something you wish someone told you before you started? Do you still work a full time job?

Thanks in advance