hey christian!
you'd need to learn about how to fetch api endpoints using javascript:
https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API/Using_Fetch
then you'd need to use the json you get to create html using javascript and then insert that into the website using javascript as well
i think this is hard to do for a beginner, i don't have time to code this for you :/
the link shows an embed, that would be better. can u somehow get that embed code and put it on a lay theme page using → + more → +html
or +more → +embed
https://www.w3schools.com/tags/tag_embed.asp
seems like you could probably just add it using +html