I'm designing a circuit board for a large industrial product which is intended to be UL certified, so the boss wants as many individual submodules to be UL certified as possible, including mine. The problem is, certification seems to be an impenetrable maze for someone who isn't an expert or doesn't have significant experience; every standard is locked behind a paywall, and there are no clear guides to which standards a given product even needs to meet in the first place. CE isn't quite as bad, a bit of googling tells me as long as my board is safe and doesn't put out much EMI, I should be good.
The board is a Power-over-Ethernet PD, the sole function of which is driving some stepper motors. I'm just trying to get some idea of what I need to take into account when designing the thing to give it a decent chance of passing certification.
In general, how is someone starting any new design supposed to find out what they need to take into account without paying large sums of money?