In order to show a realistic picture in the representation of a self-selected time period, usually a research is required first. These researches usually should take into account two dimensions: the geographical and the historical. So one deals with the garment of a certain region at a certain time, or with the garment of different regions at a certain time, whereby the latter is rather rare. Illustrations as well as texts are available as sources.
The best source are evidently original textiles in museums, since, in contrast to texts and illustrations, they are not filtered by the perception or intention of an author, but which appear unfiltered to the viewer. Because textile artifacts suffer to a great extent from harmful environmental influences, shape and color change over time and the material becomes brittle and rots. Depending on where a textile has spent the centuries and how it was dyed, today's color impression can be completely distorted and important parts may be missing. At least, cuts are best understood and reproduced here.
By contrast, pictorial representations can be filtered because different people perceive the same object with different weightings depending on the reference system. There is also the possibility that the artist has reproduced only what seemed important to him in his frame of reference. In the end, the artist could have had a certain intention, one based on his reference system, but mostly unknown to today's observer, and may have used certain artistic freedoms to pursue it. Therefore, the more information there is about the timespirit and the artist, and the more images there are of the hand of different artists, the more useful are the image sources, and this is not the case until the end of the Middle Ages. This is particularly evident when looking at late medieval representations, which had several centuries past periods to the subject.
In the case of texts,essentially applies the same what has been said about illustrations. In addition there is the problem of understanding the text: a text can be translated (then the translator acts as an additional filter) or in an old version of the reader's mother tongue, in which certain words have different meanings than today or their meaning has been lost - what the Readers may not be aware and may lead to misinterpretations.
Often, both the reproduction of pictorial or textual representations is only possible through experimentations to determine whether the realization can serve the intended purpose, or whether detailed changes are needed to achieve the purpose. This is exactly where I want to start with my activities to realize your ideas.