and they will be many. I'm going through the same transition at a start up and it isn't easy. The biggest thing I'm finding is that even though you are supposed to be a strategic thinker and solve business problems, you will be asked to get back into the weeds and do what your last job required. While you are playing super hero to your technical comrades you will be testing the patience of those who expect something different. Don't throw in and help and you could be seen by those constituents as not being a team player. Knowing when to do that can be tricky. Eventually you would think that hiring over time will mitigate that but it may be a long tough slog. The other thing I'm running into is finding that delicate balance of where my ability to take charge and own things and stepping over my boundaries are. While I'm dithering wondering if I'm going to piss someone off, someone else is unhappy as I'm not meeting their expectations. So there are macro changes to deal with, that being telling people what to do and expecting them to perform and micro that are more subtle where you have to take some chances and learn from the bumps and bruises you will get when you are wrong. So keep an open mind, you are no longer the expert in this arena, surround yourself with people who do know and can help you, be humble and take lessons to heart, and one thing I never see managers do very often, learn your craft, the promotion is only the beginning.

hell my place of employement would either ask me to choose, life or work or would ask us all to stay at work and not leave the building...