If you define the nominal force in your load case and wish to divide it into 60 steps, the step multiplier should be 1/60 in each step.

W.r.t. the monitor, component 3 of what have you selected? External force is what you are interested in when applying force loading (reaction when applying prescribed displacement).

I have tried to do like this:
I go under loading-->load cases-->add. The I chose Forces.

I the go under Joints-->add.
Chose magnitude: 3,0 MN,
coordinate system: Global,
Direction: other, Xg=0,0 Yg=0,0 Zg=-1,0

and then I manually chose the node I want applie the force on.

Then I go under Run-->analysis steps-->
load cases: 1-->
Global solution params: Standard Newton Rhapson-->
Analysis step mult: 1,0-->
number of added load steps: 60

Then I go uner monitoring points -->
type:value at node-->
Item: component 3-->
topological data: Macroelement-->
Macroelement:I chose the macroelement I applied the load at-->
closest to the point: Here I manually put in the coordinates where I applied the load.

The problem is when I run it. I get a message that says the RHS vector is zero. And the force and everything else is also zero.

Any ideas whats wrong?