Welcome!
The Search Bar in the upper right corner is great- you can search the entire site or specific boards for topics or information you are looking for. The is a wealth of information here!
Also pay attention to the threads that are 'stickied' to the top of each board- they generally contain information about rules for the board or important discussions that everyone can benefit from.
I use the "Show unread posts since your last visit" link next to my profile pic to keep up to date on all of the recent conversations, but it is great to just browse around too. I have picked up so much from just reading, and one thing leads to another.
Welcome again!