Try a small dab of Sticky Tack. Available at most staple supply stores. It can get messy so use very little. A dab about the size of a match head.
Wedgie Nylon XT Textured Picks has a few good review. If you can find where they are not sold out.
3 fingers will fit on the second fret.. Try up the neck about mid way. It may be you need a set up to lower your string.
It does take time for muscle memory to set in.
I have my index finger closer to the first fret. Middle and ring finger close to the second fret. Make sure your fingers point in at a 90 degree angle.
-----X---R
---X-----I
-----X---M
Maybe this will help.. good luck