Baby night owl

So my LO is 5 months now and he is a) not a great sleeper and b) such a night owl! He doesn’t go down for the night until about 1-2am and I think it has to do with the fact that he’s still on “womb schedule”; I’m a night nurse so I was usually active throughout the night while working, as was he. Lately he hasn’t been taking many naps during the day and fights his sleep at night. Any recommendations to get him on a normal sleep schedule that doesn’t involve letting him cry? I get that it works for some people, but it’s not his fault he’s not sleeping- he’s a baby. I can’t see myself making him miserable for our convenience. Thanks everyone!