Psalm 1 is classified as a “wisdom” psalm. In many ways it functions as an introduction to the book of psalms.
Bill Wilder speaks on how and why to interpret the Psalms. Bill Wilder is the Director of the Center for Christian Study (www.studycenter.net)
Psalm 98 is a victory or coronation psalm. It has 3 stanzas: 1-3: praise the Lord as savior; 4-6: praise the Lord as King; 7-9: praise the Lord as judge.
The heavens are telling of the glory of God; And their expanse is declaring the work of His hands.
Psalm 130 is an individual lament and a repentance psalm.