Generally, theaters have three floors, the dress circle is the second floor, the first floor is usually called stalls, the third floor is the grand circle, and the balcony is at the end. If you want to see the faces clearly, you must be in the front row of stalls and the front row of dress circle. Rows of 20 or more are impossible. Watching a theater might block your view.
The best locations are: around rows 5-10 of the stalls, and the first 5 rows of the dress circle. The rear rows of stalls and dres circles will block the view, which is a bit unpleasant. For example, if you sit in the back row of stalls and happen to be sitting in a seat that is covered by the protruding part of the second floor, then the upper 1/3 of the stage is missing.
If you want a cheap price and just want to experience it, sit in an unobstructed position in the grand circle to see the whole scene, and go as far forward (far) in the middle as possible
If you want to see the actors' expressions and be more immersive Sitting in the front row of the stalls is also very cheap, because the stage is high and you can't see the back of the stage (if the actors are behind the stage, you may only be able to see the upper body), and sometimes you have to stretch your neck. Each has pros and cons, it depends on which one you prefer.