Lot of great suggestions. I have always had a different approach to learning something new, Intarsia was no different. I am lucky to have a local scrolling club. but when I joined Intarsia was only being done by a couple of folks and most of that work looked like only the edges had been rounded over, for the most part I was not impressed. Good precision cutting skills are in my opinion crucial. For My first project I took an intarsia pattern and cut it out as a segmentation. So that I did not have to worry about fit. I wanted to practice shaping before committing to exotic woods. I shaped until it appealed to my vision, it really helped having pictures of a completed project. The next piece was still a simple wood but I cut individual pieces incorporating grain direction. I then went to using the different woods. After a few pieces I decided to take an intermediate class from Judy Gale Roberts. There I got a good taste for the detail, wonder wheel and her huge sanding drum and all of the other sanding tools, that I of course added to my workshop.
One thing to look at when you start doing Intarsia , wood Toxicity and DUST COLLECTION.
https://www.wood-database.com/?s=toxicity