Hi Smitty,
In Onecnc lathe, what you'll do is simply create the nc code in the order in which you wish to have the final program run.
In general terms, this means do all the operations you have outlined, and the nc code will be created.
You will want to customize the tool change info, and the tool change numbers (even if you don't use an automated tool changer), so that you get the correct code output at the end of each step, and the beginning of the next one.
Tell me that you understand and use tool offsets, and a G92 relative home position