I don't know how to use commas and it scares me to ask.
Why are you afraid to ask?
I'm a simple man and a comma is a scary thing for a simple person like me.
There's no need to be afraid to ask about how to use correct punctuation. Most people are happy to help you.
If you can't help, are you going to get someone to help me? I don't know who I am supposed to ask.
If you need to ask about writing you can ask any you trust and that you think is smart enough to give you the right answer.