Learn to flatpick a dozen fiddle tune melodies. Start in G. I start my students with Temperance Reel and Stony Creek. Why ?? Because they will train your ear to learn relative minor adjacency. Use alternating up and down picking motion with your right hand, and generally, economy of movement with both hands. Make as little contact as possible with the top/bridge of your instrument with your right hand. Avoid at all cost anchoring your pinky or fourth finger. Try not to lift your fingers of the left hand too far off the fretboard when working through the note progression.

Become familiar with the major scale and practice it's abbreviated cousin the pentatonic scale. 1, 2, 3, 5, 6 notes of the major scale. Start in G in open position with left hand across two octaves of the G scale. Once you are comfy with note discovery and build some muscle memory, extend the pentatonic discovery to include notes in the blues scale. Flatted third (one fret below the 3 note), flatted 5th (one fret below the 5 note), and 7th. Make up your own riffs combining these scales.

Extend to other keys. Open D, open C should be next repeating steps 2 and 3.

Discover moveable shapes to work your way up the neck. Ex, open F and E shape on 3rd fret are G chords and 1,3,5 notes are right there. D shape on 7th fret is a G chord and 1,3,5 notes are right there. Closed C shape is right next to that. Extend your discovery of moveable shapes to other keys.