You’re welcome! For the logo, you could resize your image to the size you want and upload a new version.
Or add some CSS like this:
.site-logo {
width: 50%;
}
Or you could use the Header Image option (Customize > Header Image) instead. The best size for it on Sela is 1180×160 pixels, so you could create one that size with your logo centered/sized on it however you like (with white space or a transparent background behind/around it) and then it’ll be the size you want plus adjust based on screen size. (If you don’t have software for that, Canva.com can be good to make those.)
For all of these options, be sure to check how it looks on smaller screens (especially a phone), as it may end up tinier than you want on mobile.)
This thread is getting pretty long, so if you have any more questions, please start a new one and I’ll check over there! ??