Congrats!!
I just started with fusion360 so I can’t speak to tinkercad’s ease of use. Take it slow and make some simple stuff to begin with, like 3d letters or a guitar picks. YouTube is a treasure trove of CAD info if you get stuck
The spiral notebook cover will actually be easier than you might think. You just need to count the holes and the distance between the top and bottom hole, then make a ‘pattern’ of holes that goes between those points.
This might be daunting right now, but Hueforge would be perfect for the designs on the front. You could do full color detailed pictures!
If you have any trouble reach out to me and I can help!
Here is a Hueforge I did, they are only 1-2mm thick which is perfect for a notebook front.
Do you not see how we are currently slipping towards feudalism? No one owns anything anymore, we pay half our money to land-lords, the rest to stay alive