It is okay to say: I don't know this. Can you help me out?
But, when asking someone for help or advice, respect their time.
Start by explaining your intended outcome and possible solutions you already thought of. This can be in a high level concept. And things you tried, that didn't work.
This shows the other, that you made an effort and are aware of what you don't know.
I am a junior frontend developer and a lot of times, when I was stuck on a problem and asked a team mate for their help, the solution turned out to be some modifications to the backend that I would have never thought of, hadn't I asked.
I would only have wasted my time and the company's money by trying to solve something I was not able to solve.
By asking I learned a lot and am now aware, when I run into similar situations.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.