How can I use classes better in webflow? I could use some random tips too

Any tips on designing on here greatly appreciated. I currently have a pretty basic understanding. I’m more of a article-based / paper-based learner. Therefore I hate the videos to be honest. Nothing personal. I so far understand that classes seem to be styled by adding one. Then, editing the of whatever the class is attached to.

However my problem seems to sit with templates. When I’m trying to change the class on them it seems to take forever given classes below them may have colors glued on. Is there a easier way??? Or are there some articles I can read explaining the Designer web app?