Hello and welcome to Writing.com!
So, the first thing you want to look through is the Writing.com 101 - which is linked right at the top of the site page.

For general writing discussions - to brainstorm or chat with other folks, you can go here - "Writing.Com General Discussion" 

For this particular forum, you get to work one-on-one with a member who best fits your writing needs.

We have a list of mentors here to look through: "Angel Army Mentor Directory"  (click on each link to see what they have to offer)

If anyone there catches your attention, you can send them a direct email letting them know you came from this forum.

And last but not least, GPS are the 'monetary' form for this site. You can accumulate them to use in purchasing different things around the site including membership upgrades. So, again look through Writing.com 101 to answer most of your site-related queries.

Hope that helps!