Help with how to fill out application forms on line?

I am writing in regards to Section 8 housing for disabled persons and how to apply online ? I thought I was already qualified and expected to have received an answer from them but I have not received one. I’m in Brattleboro Vermont 05301 and I’m in need of lower rent because I’m on Ssdi and can’t afford my new rent increase. I’m trying my hardest to make contact but I’m not very good at all with the internet. I’m 58 and I’m single and struggling like most. I hate to ask for help but have no choice. Please get back to me when you’re able.
Sincerely Cara Mason