It would help if we knew what parts of the process were hard for you to use.
On the whole, it's a pretty straightforward process. I've posted fics elsewhere myself, and AFF is no harder than most. I actually found FFN to be the largest pain in the nethers, because I had to upload my story to their editor and then fix everything their editor did to my formatting. I haven't posted there in years but I can't imagine it's much better.