The Weber is great for your endeavor. Shoulders are super easy to smoke:
- smoke between 225-250*,
- ride out the stall no matter how long it takes and how much you want to panic,
- smoke to temps and not time
- foil at 165*
- take to 190* if slicing, 200-205* if pulling
- wrap in towels and place in a cooler for a minimum of an hour.
Keep things simple to start with regarding rubs & sauces. As you develop your craft, you can tweak things a little at a time until you hit your stride and find what you like. Remember, spices and rubs are ingredients, sauces are condiments.