To install a shower head with handheld, gather essential tools like a screwdriver, pliers, and level. Identify the core shower fixture components: shower head, handheld shower, shower arm, shower hose, wall mount, and shower valve. Secure the necessary additional materials, including screws, anchors, water supply lines, drain, gloves, safety glasses, and manufacturer’s instructions. If needed, consider seeking assistance from a home improvement store or hiring a plumber for professional installation and repairs.