Hello there. Is there a way to manually reduce the polycount of my character, just as we can reduce objects through the InstaLOD?

Im asking this because Im new to CC3 and it doesnt seem like I have much control when exporting through the InstaLOD. It allows me to choose how CC will handle each LOD durring export, but I cant really see how its gonna look like until I open it in another program. So I was wondering, manually preparing each LOD is a viable option? I know I can edit all accessories and clothing just fine using the Reduction Element/Object, but when it comes to the main mesh it seems like I can only increase its subdivision, and not reduce it any lower from the starting mesh project.

Thanks!