Hey, it's always great to see new authors on deviantART popping up - the community is growing pretty fast, so if you need anything, I implore you to send me a PM. I follow a strict moral code to help out new content creators when I see them, so
please, please, please come in contact with me and I'd love to help you out the best I can!
Also, in terms of getting art for your stories, I can see what I can do to help you out to get there as well. There's a lot of people taking in commissions on deviantART, and I'm sure with two noggin's together we can find someone perfect.
A well-known hub to the community is
CRLiterature, where you can find the official community volunteers as well as the local community admins, who run a wide range of projects. There is also quite a chain of critique-based groups which typically provide commentary from whomever is available on team.
I hope you have a great time on deviantART!