Social Proof Section

Hello! I'm a newbie in coding. I just took some time off, but I've done some challenges here on Frontend before so I hope I don't forget everything! When doing this challenge, I realize that building the desktop version first is more natural for me, maybe because it's usually more complex and I like to finish that first. I know that mobile-first approach is more common these days, so please give me some tips on how I can be more comfortable in doing that.. Thank you so much!!