For arms I do this workout with weights that make it somewhat challenging, but not impossible (maybe start with 5-8 lb dumbbells each hand)
Do groups of two one after the other, 1 minute rest, down the list.
10 Bicep Curls
10 Lat Raises
10 Laying Chest Press
10 Tricep Rows
10 Tricep Pulls (on side of bench)
10 Shoulder Press (standing)
10 Squats (one weight, switching arms each squat)
10 One-sided lat raises from ground to above head (weight starts on ground, pick up with one arm, keeping it straight, lift until your arm is straight up and down)
Repeat cycle 2-3 times, increase weight after a few weeks
Hope this helps! :)