Pas de curseur du texte Adobe première pro CC 2019

Make sure your scale in your Windows operating system is set to 100% or the recommended scale (125% gives issues).

Sometimes manually resizing the Program window makes the cursor reappear.

Are you using the text tool (the t in the tool pallette)?  When I select the text tool and click on the program monitor, the cursor becomes a red vertical line where I can start typing.  A text clip is created in the timeline.  As long as that clip is selected you can click and drag to select all or part of your text.  if you click on a different area, you can add text to that area.  In the effect controls, you can adjust font, position, etc.   If this is not the behavior you're seeing, post back and describe what's happening...