How to see batting practice

I went to last Saturday’s game where we beat the Angels. I got there when the gates opened and the angels were on the field doing batting practice. I walked down to the Astros dugout expecting them to take the field for batting practice next but they never did.. Does anyone know how to see the Astros doing batting practice?

Also I noticed as I walked around the stadium that the Michelob ultra area seems to be standing room only. But it appeared that an usher was checking tickets to allow people into that area. Does anyone know how to get tickets to get into the Michelob ultra area?