Vertex Problem

[Gen Bloodhorn]

i have finaly drawn a sketch of the model i wanted to make in my school notebook but i want to start the model by unmerging vertices and connect them (make triangles) when they're on the right position (i don't know what i was actually saying) any way i can do this in MDLvis or Mago's?

Example:

Before

After

did you get what i mean?

please help me.

any help would be greatfuly appreciated