3:44 PM, Sunday April 16th 2023
Thanks!
As for knowing where to start, it all comes down to your judgment and how precise you want to be. Like in the usb plans I quickly did, both are valid approaches to starting an object with one being more precise. Essentially you decide whether you should divide it into 3rds or 5ths, you determine how to approach it, the orthographic plans allow you to make decisions for where you want everything to go before you construct the object. If it's still confusing I just made a video demo for a fairly simple object here which I haven't edited at all except for text on the screen explaining the process. The video just shows how I would go about constructing an object for lesson 6 which may or may not clear up any confusion you had.
If it didn't feel free to ask if you still are confused.