I really like a song and when I saw the chords they are : F#, C#, Dm#, B. And I'm beginner so is there a easier version for these chords or like change the chords and use a capo?
If you're happy playing open chords as opposed to the barres involved here, take the song up by a semitone - most likely not going to strain any tonsils - and substitute as follows. G for F♯, D for C♯, Em for D♯m and C for B. Pretty simple and straightforward. The only drawback really being you won't be able to strum along with the track - but that wasn't mentioned...
Indebted to trolley813 - by tuning the guitar a semitone down, it will render averything back to the 'original' key.
If you put a capo on fret 4 you can play three of the four chords using open chord shapes.
F# at the 4th fret can be played with a 'D' shape:
C# at the 4th fret can be played with the 'A' shape:
B at the 4th fret can be played with the 'G' shape:
The only slightly more awkward one in this situation is the D#m, which could be played as a barre chord:
You ask about using a capo. By putting one on the second fret, you can use open chords as if it's in key E.
The F♯ now gets an E shape, the B gets an A shape and the C♯ can be played as B7. Yes, there's an extra note, but that's acceptable in a V chord. The slightly odd one's going to be vi - the D♯m, which is pretty close to F♯6. By playing an E6 shape (022120) it will sound o.k.
So, you'll be using 'open' chords, four fingers maximum, all changes straightforward. Give it a try - and you're still sounding in the same original key - F♯.