Step 2: Blending
That being said we want to add the lemon juice and water first. Since there's so little sweetener we want to go ahead and add it so it will be distributed evenly (if there was a lot of dry ingredients you would add them after the solids). Next, add the yogurt. Finally, add the frozen strawberries. Now you need to add ice to make the smoothie a bit weaker.
Once everything is added, you're ready to go. So flip the switch, press the button or whatever your machine needs to get going. Depending on the quality of your blender you may have to stop and stir before you reach the desired consistency.