The F sharp major scale has six sharps giving us F, C, G, D, A and E sharped in this scale.
This scale has one open note, the 2nd string B. Not a good scale for open chords. You could also tune your guitar down a half tone and play in G.
This scale is made from the tetrachords from the B and C sharp scales.
These scales are related, you will see the same notes and chords in the C sharp, F sharp and G sharp scales.
These scale names are also the names of the major chords in the F sharp scale.
The first tetra-chord comes from the 2nd tetrachord in the B major scale and the 2nd tetra-chord comes from the 1st tetra-chord in the C sharp major scale.
The major scales have numbers that match up with their notes. This way of referring to numbers makes it possible to refer to all scales and chords no matter what key you are in.
Referring to chords the numbers are written in Roman numerals, upper case for major chords and lower case for minor and diminished chords.
This is how the key signature looks when you're in the key of F♯. The Sharp symbols are on the F and D lines and the C, G, A and E spaces of the staff.
This doesn't mean the music can't have other flats or sharps in it. They will be marked in the music itself but the F, C, G, D, A and E won't be so you have to remember them. B is the only note that's not sharp.
Here is a link on how to read music notes.
When you know the circle of 5th's it's fairly easy to remember the sharps. The 5ths circle is the 4ths circle in the opposite direction.
To learn more about intervals check out the intervals page below.
I hope you found this page useful.