Welcome to the community! You should read the documentation about building an stable mesh. It will offer some good advice. I can recommend some do's and don'ts. Crees, peanuts, lightify, xiaomi (to name a few from experience) cause known issues with hubitat. If you're going to use bulbs, the most recommended are the sengleds because they don't repeat and bulbs make terrible repeaters. Most people that use these problematic devices are using them in a segregated way. On another hub of some sort. So when asking about devices, and reading advice, make sure you know how they're connected to their hubs. There isn't one setup that will be identical to yours. So be wary of "it's been rock solid" as a response unless you know how they are using it in their setup. There's also great info around here if you search out a device you're looking at. You'll more likely find info on it. Work slowly and follow the advice on the getting started documentation.
I'm happy you found hubitat. I think you'll like the local control, but be aware that it limits what you can do from afar. There are ways around these challenges, but to set right expectation is crucial. You'll get lightening fast responses from your devices on a local level, but when connecting to cloud services, you could still experience some latency. This hub is for tinkerers for sure, so if you're not sure about something, please ask before you grow frustrated. Or throw your idea out there before you start. Someone is always around to answer your questions. I hope this bit of info helps to elevate your experience.
Welcome to the rabbit hole. We'll see you on the other side.