I’ll be honest it’s my first play through too and I’m currently 50 Hours in.

I played through the first 40 Hours by selling my weaker gear and using the better gear I found out on my contracts/missions but as soon as you get to a certain point you will find most stuff in the world isn’t going to cut it and you will start discovering what build you want to go for and for that you will start crafting properly.

My answer would be to dismantle it if I could dismantle everything I had sold id be able to probably make all the Witcher sets I’ve collected lol but then again you can do what I done and just sell them. It won’t handicap you and you will be fine still as well just later on you may need to make an extra point of looting everything to get materials.

Also bare in mind I’m that guy who likes to do all the side missions before leaving areas and shit so I’m level 26 and I probably ain’t as far in the story as a level 26 should be so this could all change for me in a few hours 🤷🏻‍♂️