I map alot, but I find it very hard to find modders (or even playtesters o.O) for hard mania 4k maps .-.
If you're planning on mapping, I wonder what's been stopping you from pursuing it so far ;o.I happen to use that program since the past 1 or 2 years.
Timing can be quite a hurdle for new mappers, but I recently discovered statementreply's timing analyzer: https://osu.ppy.sh/u/126198. It's surprisingly accurate when the song is a single bpm but won't work as well on variable bpm songs. (Generally speaking though, mapping variable-bpm songs as your first map isn't the best idea)
I'm hoping to see more new faces in the qualified section xD. I can't really name any "2016 mappers" that weren't also 2015/2014 mappers aswell.