There are a couple sites where you can input name choices and receive a list of "similar" names. For example, you can input "Noah" and get back Jonah, Mikah, and Morgan. I use these tools ALL the time. Here's one I found now: http://www.magicbabynames.com/
For me personally, I like to give my characters names that feel familiar but not terribly common, and I lean toward gender neutral or just "incorrectly" gendered nicknames. I named the four (male) protags of my comic Robin, Cas, Lin, and Olive (shortened from Oliver), and didn't realize until much later that I'd given them all girl names, hahah. But I like the vibes!!
I don't typically rely too much on name meanings unless I'm super out of ideas. I named one character Artemis just because I couldn't think of anything else to fit my androgynous redheaded Utena antagonist-looking theatre kid. But I also named another character Rei because I wanted her to have "kingly" vibes, so it just depends on what I need!!