This verse of Scripture instructs us to seek first God’s kingdom. For emphasis, Jesus adds “and His righteousness.” That is, God’s kingdom is about doing the right thing.
You will find no such verse in the Bible instructing you to seek church. That instruction comes from those who operate, and benefit from, churches.
If you are familiar with the Bible, or want to be more familiar with the Bible, you may want to read my related blog: A Bible Reader’s Guide to Jesus and His Kingdom.