Welcome to this forum.

It is better you start first reading the important information for newbies. Go to meta and beginners & help and read the threads that are pinned.

Meta: https://bitcointalk.org/index.php?board=24.0
Beginners & help: https://bitcointalk.org/index.php?board=39.0

The most important among them are:

Unofficial list of (official) Bitcointalk.org rules, guidelines, FAQ
Merit & new rank requirements