At bar 15 play slightly ponticello (closer to the bridge) for clarity when the voicing is in the bass region and come back to a more natural tone half-way through bar 18. Watch out for the jump to the 7th position in the
Dmiddle of bar 22 and the fretting hand stretch midway through bar 23. Fretting hand fingering is indicated from bar 24 to 27. I’d strongly recommend that you adhere to this as it will facilitate the most fluent performance.