Seconding the crow effigy idea (well, I didn’t do it with an effigy, I just left them a couple of shiny stuff).

For me, what I did was sit on my doorstep for a while, to get them used to the sight of me. And then I made sure they saw me leaving the shiny thing. I wasn’t forbidden from feeding them, so I also let them see me putting out some seeds.

Although feeding them is prohibited, the crow effigy idea person said to have a few cashews or similar in the little nesty thing, and I agree that this would be likely be necessary to draw them over at first.

If you’re okay with bending the rules a tad, if the sitting outside thing works and you’re able to not scare them away, then leaving behind just a cashew or two in your wake (if the crows are nearby) could help them to begin to associate you with good stuff.

Though if they’re dive bombing you, it might be challenging to come back from that