열다 & 열리다 = open
닫다 & 닫히다 = close/shut
=> Yes. You're right!
열리다 & 닫히다 are not progressive but passive form. Progressive form is (문이) 열리고 있다 & 닫히고 있다
The difference of usage of verbs makes you mixed up. 열다/열리다 is 'open' and 닫다/닫히다 is 'shut' or 'close' in English. And 'open, shut, close' are both intransitive and transitive verbs. But they are different in Korean language
ie) 나는 창문을 열었다 I opened the window / 창문이 열렸다 The window opened (by me)
=> ~을 열다 / ~이 열리다
* 문을 천천히 열려요... The door slowly opens...
-> 문이 천천히 열려요
-> 나는 문을 천천히 열어요 I open the door slowly