1. Sharps
To find a sharp note take the natural note or in this case G, and move up one fret to the body of the guitar. So G# is on the 1st fret of the G string.
2. Fingerings
Follow the directed fingerings on the music, it will make the piece smoother.
3. Counting
Count while you play, it is tricky at first but it will get easier and will develop your sense of rhythm.