Can I get help without having a product?
Most likely :) what do you need help with?
I am windows admin and planning to join the security team in my company, but I have to clear an interview process. I need some help to learn the product. Can I use this forum for that?
What Symantec product specifically?
This forum is for Symantec products so if it's for a Symantec product then yes you're in the right place.
I think its Endpoint Protection
The SEP knowledgebase is here:
You should be able to search for what you need as well as use this forum for a reference. If you have any other questions, feel free to send me a PM and I'll get you point in the right direction.