You could register on couch surfing, it might be a good place to meet people once you start exploring options in Europe. You can also ask questions and advice, there is also events organised by people so it works a bit like a forum/ social media platform. You don’t have (the intent) to host or stay with someone to use it as as a source of local info: https://www.couchsurfing.com/

Also maybe this is valuable (maybe less if you’re only interested in moving around in the Schengen area): https://www.passportindex.org/passport/united-states-of-america/