Construction planes where you need them, would not say necessary, but sure make life easy.
Sketch 1 had a vertical line on the origin, so using that, I did the Plane on Angle, looking down from the top, set it to where I thought looked right, but at a wrong angle according to the Canvass so you would need to edit it, for your learning experience.
Yep Project > Intersect the face of the face. (Purple curve)
Look At - the sketch and drew the blue line, close to radial across the purple line, (still adjustable - Drag end points to suit)
Create > Pipe Select Blue Line, Set diameter.
Create Sphere, placed on the centre of the pipe. (freehand)
As the eyes are too small and too wide, not close enough to the nose.
Open Change Parameters, tick immediate update,
adjust the window/s size so you can see the head, and the parameter table. Dig down to the Plane entry,
Edit the plane entry, and change the angle value, tab to another field, and the model updates.
Same for the Pipe, fillet and sphere values. Repeat till Happy, Close Parameters.
For the blue line, alignment, slide end points. When happy, Edit sketch and fully constrain the blue line. Angle, length, and position.
Might help.....