If you want to achieve the foundation of arm balance yoga poses you can safely explore these poses, the exercises are not too demanding.
Workouts: 10 Exercises to Prime Your Arms for Yoga Poses
Shoulder Yoga
Tips for improving arm balances
Arm Balancing
Yoga Arm Balances: Don't Let Them Discourage You! - TINT Yoga
Arm Balances
Arm Balance Sequence for Flexibility and Focus
Arm balances preparation to adhomukha Vrksasana, lolasana, bakasana- intermediate–recorded workshops-04.03.-Los Angeles - Online Iyengar
Arm balance poses: fun challenge or necessity? - Sequence Wiz
Yoga Arm Balances: How to Build Strength and Stability - Movement for Modern Life Blog
Crow Pose Arm Balance
9 Yoga Poses to Build Arm Strength - Yoga Journal
Chair Yoga Poses 7 Poses for Better Balance
Yoga Arm Balances: How to Build Strength and Stability - Movement for Modern Life Blog