Lost Soul created a mod that allow you to choose your starting equipment.
I tried it yesterday, it work well.
https://www.nexusmods.com/baldursgate3/mods/357I personnaly think it is a bit "OP" as is. Metal gloves and boots gives bonuses. So is the drow armor.
I'd like better if boots/gloves choices were only cosmetic and if we only had the basic armor choices but it is still better than native.
It should be possible to create "training" gear with skins that are already in the game.