You can. It's just harder.
A lot of people end up hating their IP by the end of HSC. It's a natural progression.
Agreed.
I love acting my character, but I got to this point where I was thinking "GOD DAMN IT! WHY DIDN'T I DO [insert random idea for monologue here]?"
So, don't be phased by that. I started off with a blind woman, which has absolutely nothing to do with what I'm doing now.
If finding a character doesn't work for you, maybe start with a theme that speaks to you, or ask yourself "What do I intend on showing the markers?"
But, goodluck
My IP is keeping me in contention for a band 5 in drama. My group is no way near band 5 material.