First, i’d like if new members like us will have a separate forum to be given some tutorials on how to make posts, reply and engage in people’s talk or opinions needed.
I do not quite understand what you mean by seperate forum, did you mean "seperate section/board", but whatever you meant there is nothing of that such, you can basically learn all you need to learn by making appropriate use of the search button and by asking questions/interacting with other users in any board, if you do not feel comfortable posting outside the B&H section, you can stick to it for now
Secondly, if we can have accesss to website or links that will teach us more about the forum. Most especially tutorial videos(most important) on YouTube to guide us through in this forum.
You do not need any external website or link to learn about the forum, you'll learn about the forum by being active here, reading the rules and very importantly, asking questions. Like i have already said, the search button would be very useful to you if you make good use of it. Having said that, whatever you do on Youtube make sure you are careful, there are a lot of fake and misleading videos that would deceive you and would cause you to lose funds, it is much better here.