rest for three weeks after injury
can be followed by exercises . but before focussing on biceps
and triceps you need to work on rotator cuff muscles and only when they are good can you safely do the asked exercises safely .
injury to ac joint makes shoulder a bit unstable on long term gr 1 and 2 injuries need only rest but after three weeks need to work on rotator cuff strength before going in for strengthening biceps triceps and pectorals