I wish there was a spell practice mode in SA.

I agree with Glaceon, the SA Extra is GREAT, but it is annoying having to go through all of the stage parts (especially Sanae, because Miracle Fruit likes to screw me over) every single time. Still, though, going through it so many times makes it easier for you to improve on your stage efforts, like consistently reaching Sanae with 4 Power and capturing Nine Syllable Stabs. I also got better with Miracle Fruit, but I still continue to bombskip Bumper Crop every time. Although you can feasibly reach Koishi with no deaths and 3+ Power anyway, being able to practice a lot lets you pull that off without putting so much intense effort into the stage section. It starts to get really natural and your fingers would move on their own, which is convenient~

ZM knows what he's talking about though. SA Extra is really tough, and imo it's harder than all the other Extra Stages that I cleared (i.e. all of them except SoEW and GFW). But it is really fun and from my own experience, I found it really hard to let go once your momentum starts rolling. I'd suggest continuing to practice SA Extra because being fun as hell makes it easy to keep trying, while its brutal difficulty will help you grow a lot as a player. Even if you haven't 1cc'd much Normal Modes, you can still end up clearing SA Extra first! Just don't be disheartened if you eventually decide it's too difficult for you, because it is one of the toughest Extra Stages out there, at least one of the top three.