Thanks TQ! I ended up just copying the CSS to a text file and saving it (but I’d be curious to know if others are having trouble with the child theme or if it’s just me). All I really wanted was to make sure my changes to the theme don’t get overwritten with any wordpress updates. For the title font size, you can change the font-size in the style.css. I use header2 and changed it to 55px:
#site-title2 a {
color: #000;
font-size: 55px;
line-height: 36px;
text-decoration: none;
text-align: center;
}
#site-title a {
color: #000;
font-size: 40px;
line-height: 36px;
text-decoration: none;
text-align: center;
}