I did a thing!
Note that this is only a plausibly period approach with modern liberties. This is just a way to make good-looking, passable Byzantine garb on a budget for themed events, allow newcomers to try out a different style or persona, or make a low-cost “casual” wardrobe for when wearing fancier clothing is not appropriate (outdoor/warm weather events, wars, etc.)
This is a beginner/intermediate pattern. You will need to know how to do facings and have a basic idea of rectangular construction. You will still need a long sleeved undertunic, as well.
Pay no mind to my lack of makeup and phone acrobatics.