D major scale with both rest stroke and now free stroke. For free stoke make sure knuckles of right hand are over the strings being plucked to allow follow through. If the fingers are running into the strings behind, the hand is too far behind the strings. Metronome up to 120 subdivided. Free stroke practice slower at first.

play through a minor prelude and long long ago every day. Again, keep hand over the strings to allow for follow through.

allegro. Practice each line on its own with metronome. Work up to 100 subdivided. Start slow with metronome on the eighth note at 120 work up to 180 and then switched to metronome on the quarter subdivided. Once each line is comfortable start combining. 1 &2nd lines and the. 3rd&4th lines. Once those are comfortable try playing whole piece. If you are stumbling on the transitions between lines slow down. Use metronome to keep yourself steady.