You're welcome Stef!
Oh! I hadn't thought about it. I have not had formal technical drawing studies, although I have designed wooden toys in Ireland, where I spent a few months, several years ago.
For myself, I have made many leather goods and furniture designs. In Belgium, I worked making evacuation plans for schools in Flanders and then I worked with security system plans, also in Belgium, but all what I know about technical drawing I have learned in a self-taught way.
For me, studying and learning are a necessity. I think that's why I haven't abandoned art, because I still have so much to learn and I'm passionate about that.