Thank you Kurt R. Womack. I don't even use this book yet. But in time, I'll probably have to. Meanwhile, I'm at a stage where I'm frantically building and relegating my studies to later, and I know I should be doing it the other way around. Meanwhile, I'm only taking inspiration from Internet photos. Thank you for the recommendation, I'll be interested in the book. :-)
Thank you all so much for nice sentences and encouragement! :-)