I was not scared to make comments on discussions i have knowledge about and i was not really concerned what rank made a post when i was a newbie if i see a post i can contribute to i don’t hesitate to comment regardless of the rank of the OP but then during my earliest days i was more interested in learning about the technical aspect of bitcoin so learning and asking questions was my main priority.
As a newbie there will lots of post which you will find difficult to comment on so it’s not all threads you must comment on, if you have nothing to contribute to the post you should let it be and follow up discussion to improve your knowledge about the topic. That’s how newbies grow gradually.
It is normal to have such feelings as a newbie and most people here also started out that way, scared to make post with the fear of not posting something out of context so you are not the only one with such feelings but i believe your fear stem from uncertainty about your knowledge that’s why you get scared, anyone who is sure of his/her knowledge will have confidence to speak anywhere regardless of who they are faced with. This is a discussion forum and anywhere newbies are not allowed to post means their opinions are not relevant, there are few boards where newbies are not allowed to participate other than those you are free to make valid comments and contributions to any discussion thread regardless of the rank of the OP but always know your boundaries as a newbie and never disrespect anyone.