Base your vocabulary on the resource and not the other way around.
Finding a resource with all of the vocabulary words you hope to teach is near impossible. Instead, find the resource first and pull the vocabulary list from there. Focusing on cognates and other familiar words or phrases can also help the resource better meet your needs.
There is no resource too difficult.
As an elementary level teacher, many resources seem daunting at first, but breaking an article or infographic into pieces can help ease the anxiety. One resource can be used over a period of multiple days to attract students’ attention to certain information.