Questions & Answers about Χτυπάω το κουδούνι και περιμένω λίγο έξω.
Yes. Χτυπάω is the 1st person singular present tense: (I) ring/knock/strike.
In Modern Greek, many verbs have two common present forms: -άω and -ώ. So you may also see/hear χτυπάω = χτυπάω/χτυπώ. Both mean the same in everyday use.
Literally χτυπάω means I hit/strike, but it’s also the normal verb for ringing a doorbell and knocking. So χτυπάω το κουδούνι is the standard way to say I ring the doorbell.
Το κουδούνι means bell, and in this context it naturally means (the) doorbell. Greek often doesn’t add a separate word for “door-”; context makes it clear.