The first Touhou game I ever played was Imperishable Night, way back at the end of January 2010, almost five years ago. Now, I was playing on a file of my brother's that already had a bunch of things unlocked, and the first thing I did when I started playing was try out Spell Card Practice with spell no. 1, thinking it would probably be on the easy side, and I could get used to the gameplay. Of course, I had no idea that spell no. 1 was Wriggle's midboss spell on the Hard difficulty, and I remember being surprised when I saw the word "Hard" over on the right when the spell started. Still, I think I actually managed to capture the spell! (Unfortunately, I didn't save the replay of that.)
After that, I tried practicing stage 1 on Normal with Yukari solo (remember, this save file already had some stuff unlocked, including being able to play with solo characters), and I did quite well for not knowing how IN's scoring and time orbs and stuff like that worked at the time. I even managed to trigger the Last Spell and capture it. And, I did save the replay of that one:
Replay (Yeah, it's quite obvious that I didn't understand many details of IN's scoring and such back then.)
Then, I recall trying to play a full game (I think with Reimu & Yukari) on Normal, and not doing so well. After failing to 1cc Normal several times (though I think I did do well enough to get the normal ending via stage 6A), I tried Easy, and I think I remember 1cc-ing Easy on my first attempt without losing a life! (I forget which route I took at the end, though.)