If you're uncomfortable with the snail's trail block, try Churn Dash, Square-in-a-Square, Sawtooth Star, Bear's Paw or Dutchman's Puzzle. These blocks require easier triangles: half-square or flying geese. Not beginner, but perfect for someone who is ready to branch out of her comfort zone of squares and rectangles. If you can master those types of triangles, it will open a whole new world of quilting opportunities for you.
Good luck with your potholder set!