Just a tip, when you play the small box chords (ex. 3-5-5-x-x-x) instead of using 3 fingers, use a barre with index finger across all strings and ring and pinkie fingers (to play 5-5). Just strum the notes you want. It'll help build up finger strength and you'll start to move around the fretboard faster as well, might open up more songs to practice with too.