1) Whatever you would like. Try both and use what you're most comfortable with. Myself, I would use im, hit I'm not you.
2) For this one I would lift the finger, because the next note is not on the same string therefore there is no need to place a RH finger. But again, either one would be fine as long as the end result gives a clear picture.
Alhambra 3C (nylon)
Yamaha SLG200N (nylon-electric)
Washburn D42SCE (steel)
Fender Piha'eu (ukulele)