T-splines - difficulties with tsFromLines

Hey, guys
Im new to Rhino and T-splines, so please, dont judge. Trying to perform tsFromLines command for planar curves, but no result. Can somebody show step by step how to build 2d polygon from sketch below. Minimum amount of polygons and keeping the original shape are required. Thank you

21.3dm (42.3 KB)

I think, (I have not worked with T Splines, never tested)
T_Spline needs four side’s layout (Keyword: Low Poly)
At your curves, turn points on and connect points with “Line”, create Layout, like example (pic2):