Need some Writing help!

Know it's been forever since I've wrote on here, or any of my blogs for that matter, but I've been super busy with starting upgrades for my Math and looking for a job. Also been working on finishing my Creative Writing course. I started working on The Never-Ending Dance that I want to expand to submit to Realms of Fantasy magazine and am having a lot of trouble. I've got it expanded to roughly 800 words now...It needs to be around 5000 to really be submission worthy....and I just can't get it expanded to that without possibly ruining it...I really need some advice on it.