This took me a long time, 8 months and nearly 10000 attempts from zero, but I did it.
I know this community is pretty dead but I do check up on it regularly to see if I need to do anything.
If you want to hear more regularly from me here's my Mastodon, I tend to not post too much about Geometry Dash but I do post about it occasionally as well as other stuff.
As for other stuff I'm doing, I'm almost done with my next level and I'm trying to complete Night Rider. I just got 37-100 on Night Rider, which is a crazy run. As for my next level, all I have to complete is the backgrounds and air deco, then I'm done. What it's about will be a secret until its release, so stay tuned. I'll probably post about both of those when they are done.
I highly recommend not beating this as a first extreme, even for me having previously beaten 3 extreme demons it was tough, I can't imagine jumping to this