How do I find a word in a text on just one line with compare two values event?

If there are line breaks in the text, you can split it into lines using tokenat() expression. So, to find the text in the first line, you can do this:

Find(tokenat(Text.Text, 0, newline), "Word")

Note, this will not work with wrapped text. There needs to be a newline character. In other words, you need to pres Enter at the end of each line.