follow up question regarding fashion inspo-- do you happen to have a pinterest board or know of other places to look for non tudor fashion that you could link? my own search has been pretty fruitless. also rly love how you draw and render fabric!! ty for ur insight and thoughts :]
thank you! this is a pretty broad question so I'm not sure that I can give the most helpful answer but I find this timeline by the FIT to be a nice, quick visual guide for period trends. Unfortunately it primarily focuses on the regions of current day England, France, and Italy, so no Rus fashions to be found there, but you can poke around pre (and post, if you like) Tudor period/outside of england to see what late medieval and early modern people were wearing as depicted in art of the time.
Rus fashions are harder to dig up and I don't have great advice there... Resources in english kind of suck but you kind of just have to scour... I try not to get too hung up on accuracy for asoiaf stuff, since at the end of the day I'm combining a bunch of different styles that I like into a fantasy setting, so I'll take pieces from bilibin illustrations, or period shows, or whatever other crumbs I can find.
unfortunately I don't have the most organized process but hopefully that is somewhat helpful!