Watch live with Fire TV stick

On Android app I can press the channel number and watch what is on. I tried to press the channel number using FireTV stick and can not. I have to select a show.

True. The cursor is always going to be on a show on the FireTv app. Just find a show and press the play button.

Yes while the show is selected you hit the play button. It will start playing right away.

If the guide has no data for that channel you can’t watch it. This is being fixed.