Can you try to give me any context (no question mark here) because I don't [STRIKE]know the[/STRIKE] understand "I was being"?
It was very busy in our restaurant. Too many customers asked for [STRIKE]the[/STRIKE] food (no full stop here) [STRIKE]But,[/STRIKE] and I was [STRIKE]being to[/STRIKE] taking [STRIKE]the[/STRIKE] their orders very slowly.
Is it okay?
Do you mean I should give up on this part of English? Do you mean that I should try another part of English because this part is not [STRIKE]using[/STRIKE] used very often?
Note my corrections above. I am sure you have been using the forum for long enough to know that you must capitalise the word "I" every time you write it.
I would say it's important for you to know, recognise and use the past continuous tenses because we use them a lot. However, the use of "I was being" is probably a little less common than many other verbs so concentrate on regular verbs first. You'll need them for things like:
What were you doing yesterday?
I was playing my guitar.
Where was he going?
He was going to the cinema.
What was she wearing when you saw her?
She was wearing red jeans, a black jumper and Doc Martens.
I can imagine you will see, hear and use things like that fairly regularly so I think they are important. You are less likely, until you're a more advanced learner, to need things like "I was just being silly" or "She was being naughty".