Welcome to the game and to the forum. 
Yes, the Classes section of the forum is the best place to post any queries about your build. For that though, if you want to use grimtools.com to link to your build, you’ll need to have 3 posts here on the forum so we have a dedicated thread for that too.
http://www.grimdawn.com/forums/showthread.php?t=48496
Stick a couple of whatever comments in there (keep it civil and polite please) and then you’re good to go. It’s a bit of a pain, but it’s part of the anti-spam measures here on the forum.
To put your build into grimtools you’ll need to click on the arrow with a bar underneath it then go to your save files and choose your character. Double click on the character and then choose the player.gdc file then click on Open. That will import your character’s details. Then click on the icon below the first one in grimtools and copy the link that appears and paste it here so others and see it and give advice/suggestions.
Crate Entertainment, the developers of the game, have a close relationship with the fan base and keep us regularly informed of what they’re up to game-wise. You will find their bi-weekly updates in this section of the forum
http://www.grimdawn.com/forums/forumdisplay.php?f=18
and they also do fairly regular live streams about the game as well. Sometimes it’s just one of the devs playing GD while we ask questions, others have been what the artists are working on or how the sounds and music for the game are made by Skewsound or Zantai (the dev who interacts most with the forum) showing off a new aspect of the game. If they’re going to stream they’ll announce it in this thread.
http://www.grimdawn.com/forums/showthread.php?t=48097
A couple of the recent streams have been put on youtube so you might want to have a look at them to see how diverse they can be.
Allminoxy’s arts stream.
Also Zantai showing us the new movement runes plus some new music from Skewsound.
Conversations are a bit one-sided since you don’t see the twitch chat part sadly, but they’re still interesting to watch.
The latest stream which was on the 22nd June is still available on Crate Entertainment’s Twitch page too.
There’s also an FG thread where I’m trying to gather all the relevant info/links/etc so they’re easily found.
http://www.grimdawn.com/forums/showthread.php?t=69297
Grim Dawn is the spiritual successor to Titan Quest since Arthur Bruno (who goes by the username Medierra here on the forum), the lead gameplay designer on TQ/IT, founded Crate Entertainment when Iron Lore folded and bought the TQ engine that GD’s been built on, albeit with much upgrading and improvements.