Instant yeast does not need to be bloomed in water first as long as you're sure it's good. If you're not sure the yeast is good, you can stir it into a portion of the warm water the recipe calls for; if it gets bubbly, it's good! If you're using active dry yeast, it can be used exactly the same way as instant yeast, but because active dry yeast has a little shell around it that needs to dissolve, it sometimes takes a little longer to activate in the dough. So your dough might rise a little more slowly than if you use instant yeast. As always, I recommend storing your yeast in the freezer — that way you know it's good!