Before buying a domain or filing a trademark, run a clearance search to check if anyone else is using that name or something confusingly similar. A trademark attorney can assess the risk of confusion and help you avoid costly conflicts down the road.
Chapters
The first, the, in my opinion, the first thing that you should do before you do any of that is to do a trademark clearance search because you could secure your domain, you can try to file an application, and there may be someone else out there that you're not aware of that is using either an identical name or a version, a few words or a letter off that may be possibly too similar or likely to cause confusion. That's what trademark attorneys look at. They look at whether something is likely to cause public confusion. So before clients even launch anything, I would recommend that they speak with counsel and vet different names.