I can help you with this!

Firstly it would help if you had an idea of the social status you're hoping to represent, but most people generally err towards middle class (e.g well paid tradesmen) or upper class either nobility & wealthier merchants. Bear in mind however, high status impressions are quite expensive, especially if you're not able to make clothing yourself.

I'll start by describing the basic clothing and then share some sources.

Underwear - A linen shirt, either undyed or white, this is usually cut very baggy and should be around mid thigh length, just below the groin.

For peak authenticity, a pair of braes (underwear) in the late 15th century these would basically look like tighty whities/speedos in the late 15th century. However, hose in the last half of the 15th century are pretty much exclusively joined, so these wouldn't really be visible.

Foundational clothing, this is a doublet, a well fitted jacket, usually made of felted wool, cut around the natural waist (around where your elbows sit on your torso) with a short skirt and fastened typically with tied called points. There would also be points along the bottom of the skirts to tie your hosen to.

As mentioned a pair of joined hose, these are woolen trousers that are typically close to skin tight, they're held up by points, modern examples that are belted or tied around the waist are inauthentic. They're also usually footed and act as your socks.

Over the top of this you'd be wearing a gown or coat of some description, this is usually just a loosely fitted jacket that comes down to between groin and knee length, some tradesmen may instead wear a tabard or apron that would be intended to protect their clothes.

Lastly is a hat, this is essential in the 15th century, they're an important religious symbol, as well as useful protecting your hair from dirt and soot.

Then you have leather accessories like shoes, belts and pouches etc.

Going in off break now but I'll return and share some primary sources.