Need help mounting a TV on wall securely and neatly

I'm looking for a skilled handyman to mount a 55-inch TV on a living room wall. The wall is plaster with stud behind, and I’d prefer a clean, cable-managed setup. I already have the mounting bracket and cables, but I’m open to guidance on the best height and alignment. The job should include locating studs, securing the mount, wiring management, and ensuring everything is level and stable. If possible, please include basic test to confirm the TV powers on and inputs work. I’d like the work completed this week in the evening if available. House is in a residential area with easy access for tools.