@aworldinpages when you say neck, do you mean the upper traps?
I love Anabolic Aliens. He uploads no-nonsense, short, intense workouts for all muscle groups, and many people find it very effective.
Just linking a couple here:
https://youtu.be/6ZjHLYVwQaw
You can find many similar videos with dumbbells/kettlebells/resistance tubes, etc., and many people find these very effective