Good morning, Santiago,
I'm so glad you're enjoying working your way through the Action Guide. It's such a great resource and yes, enjoyable as long as you know it takes time and can't be done overnight!
That niche sounds fascinating! Funnily enough, I happened to see some YouTube videos yesterday explaining how some "magic" tricks are done. I have no idea why they came up in my YT feed, but I spent some considerable time watching them and yes, it was fascinating! So a successful YT channel would be a definite possibility for you in the future.
I suppose the only thing I'd say is, if magic isn't something you've done before, you have a double learning curve: learning how to build your business with SBI!, and learning how to do magic tricks. It can be done - when I began my backyard chickens website I knew almost nothing about the subject, but enjoyed learning "on the job" and now have a very successful business in that niche. Yes, it took time and hard work but I loved it and still do, nearly 6 years later.
So if it's something you're passionate about and think you would remain passionate about for some time to come, I'd say it's a great niche!
I would also say, keep working your way through the Action Guide and don't make a definite decision until you've come to the end of DAY 4. You need to be sure you can monetise whichever niche you choose.
You're definitely getting there!