Joomla is the second-most popular content management system behind WordPress. Similar to WP, it can be used to build a variety of websites and applications for businesses, schools, non-profits, online stores, and so much more. Because Joomla doesn’t offer a paid option like WP and is geared towards a more experienced user, your only means of support is searching through their forums and developer communities for help.
If you like more than one domain, the smart move would be to register them all. That’ll let you take your time deciding without the risk of someone else swooping up the one you really want. Once you have a handful of website names you like, ask around. Conduct an informal poll with friends and family to get other people’s opinions on which one you ultimately use.
How to Buy a Domain - Why Buy Your Domain from Namecheap
I agree with you that Pulse CMS offers an interesting way to go, without databases. Before moving all my sites to WP over the past two years, I had always felt reluctant to use databases: but testing WP had convinced me to go ahead. Although I do not use it at this point (I played a little bit with previous versions), I bought a Pulse CMS license, if only in order to support that interesting project. I do not rule out using it for a site some day, at least experimentally.