Designing a webpage like this

Hi all, this is Justin from the US. Our team is planning to design a platform that aggregates different types of study material in NYC. We are doing research and came across with a site with this design:

We also took reference to their page design which we think looks really suitable to us:

As a beginner developer, it would be great if you could offer some advice on how I should kickstart. Plugin is also considered. Your help is highly appreciated.