Scales to Play Over Esus2
Every chord is a subset of several scales: any scale that contains all of a chord's tones fits over it. Pick a chord to see the matching scales from its own root, the major keys the chord belongs to, and full fretboard diagrams for every scale on guitar.
A Esus2 chord contains the notes E – F# – B. Any scale that includes every one of those 3 tones fits over it — from the root E, that means E Major, E Natural Minor, E Melodic Minor, E Harmonic Minor, E Major Pentatonic, E Rock 'n' Roll, E Dorian, E Lydian, E Mixolydian, E Dorian Bebop, E Mixolydian Bebop and E Gypsy Minor. Start with the first scale listed: it is the most common choice, and the others color the same chord tones differently.
Esus2 is also diatonic to 5 major keys: A major (relative minor F#m), B major (relative minor G#m), D major (relative minor Bm), E major (relative minor C#m), G major (relative minor Em). In a song from one of those keys you can also solo with the key's own major scale or its relative minor pentatonic across the whole progression, not just this chord.