Hi C_D_C,
Wall stones come in a variety of textures and styles. The different sizes of stones will dictate how high the finished wall can be. Look for the wall height limitations when selecting your stone.
Building a retaining wall is similar among most of the wall stone choices. Be sure to build in a drainage system behind the wall to release hydraulic pressure from water that drains down the hill. A perforated pipe in a bed of gravel that runs along the back of the wall at its base will allow water to drain around the wall, rather than through it.
Leave one or both ends of the pipe open to allow the water to escape.
Once you have decided on a particular stone, installation is going to be similar no matter which stone you choose.
Here's a video from Pavestone that shows the steps.
Keep us posted with your progress. I can't wait to see your wall.
Thanks for asking and Welcome to The Community!!!
Travis