just my suggestions!
Go to a Ski shop and look at their layerings. A LOT of what I learned ; I learned out skiing in brutal cold weather for hours. The materials to look for are: silk liners, mylar liners, 100% wool and polypropylene. Nylon is not warm but it IS a great wind blocker so a lined wool jacket performs both functions of course. Read the labels of any socks/glove liners and make sure there’s only the above or combos of the above.
Also go to a camping or hunting store or store section. They sell good products for warmth but again read the labels. The warmest stuff WILL cost more but will last a long time and be worth it.
Silk glove liners under thinsulate gloves. Silk socks under thick wool socks under a pair of knee high nylons are good under your boots.
One of the big secrets is to wear looser/largers sizes so you CAN layer underneath. My winter boots are a whole shoe size larger so I can wear the socks AND most importantly won’t cut off the circulation. Anything tight (like tight calved boots) decreases the circulation to your feet and the warmth! When/if you buy a winter melton; get a size larger for sure so you can layer and still move.
And who cares if you look like the michelin man?!! It’s not about looks! It’s about survival, comfort and fun!!
Carry on!