one thing nobody mentioned, whatever you end up with save the favicon as a proper .ico with multiple sizes baked in (16, 32, 48) not just a png renamed. browsers and bookmark bars pull different sizes and a single png favicon can look crusty in some spots. takes 2 min on any favicon generator.
looka was a fine call for getting moving though. dont overthink the logo at this stage honestly... half the blogs i see ranking have a logo thats just text in a decent font. nobody clicking from google cares about your mark, they care if the content answers what they searched. sort the branding later once you actually have traffic worth branding for.