Trouble solving for voltage gain
From the history of comments the original schematic was updated.



Rs and Rd are now in series because we're in small signal mode so that ground symbol doesn't matter. Then Rs+Rd is || to ro. Should be super simple from there.

$$Vout-V_{1-} = -gmV_1*(Rs+Rd||ro)  $$
$$\frac{Vout-V_{1-}}{ro} = I_{ro}  $$
$$gmV1 + I_{ro} = I_{Rs} $$ 
$$ I_{Rs}*Rs = V_{1-}  $$

Should be enough to solve it?