finished creating a mesh. next steps?

created a facemask- whether or not it'll be functional is a problem i don't have the emotional space for just now but i'm proud of how it looks!

i begun with a septum nose piercing, deleted it, and made this from scratch. i've also unwrapped it & marked seams, etc, likely kind of janky but it's practice. however importing the mesh does nothing in s4s, it just shows up as the nose ring...?

how would i approach uv mapping & texturing this thing? the texture(?) for the nose ring is veeery small so i'm guessing i don't bother with that...?

thank you for your time, sorry in advance for my cluelessness!