“I’m working on a project” – present continuous or present perfect continuous?

I want to say that I’m working on a project lately, maybe this month or this week, but I don’t specify the time in the sentence. I’m still working on a project and I will be working for some time. It doesn’t mean that I’m writing a code for the project now, at the moment, when I write the text or something. "I'm working on a project". Is the sentence built correctly if I want to convey that meaning?

As far as I know, Present Continous use when action doing at the moment, right?
But that sentence not about the current moment, but about the current time interval.
Why there is doesn’t use the Present perfect continuous tense?
A lot of examples on the internet uses the Present Continous tense.

Answer

‘Lately’ is used to emphasize the closeness of the action to the present time. So, it used for things that happened recently or started not long ago. So…

‘I’m working on a project lately.’ –> Incorrect

"I’ve been working on a project lately.’ –> Correct

"I’ll be working on a project soon.’ –> Correct (Similar to lately but leans toward future)

"I’m working on a project." –> Correct

"I’m working on a project right now." –> Correct, but ‘right now’ is unnecessary.

Attribution
Source : Link , Question Author : User98 , Answer Author : VKBoy