Question on split circuit, on how the impedence/resistance splits with the voltage.

I appreciate English is not your first language, but the question as phrased does not make any sense. I think that what you are looking for is Kirchoff's voltage and current laws. There are plenty of hits that explain it if you search for Kirchoff's current & voltage law.
Sum of currents entering and leaving a point is zero.
Sum of voltages around a loop is zero.

Hi,

The picutre is not clear either (at least to me).

In electronics we have standardized symbols and technical terminology .. to explain clearly and avoid misunderstandings.

* I see an earth symbol ...
* and I see a couple of yellow lines (which - in schematic - are ideal connections/wires (without impedance)
* and I see the colored circles. Don´t know what they mean.

Impedance is Volts/Amperes --> V/I ..
Impedance (in opposite to resistance) causes phase shift and usually depends on frequency.

For a single frequency:
* If two impedances are in series ... and both impedances have same phase shift --> the impedances add.
* If two impedances are in series ... and both impedances have 180° phase shift with respect to each other --> the impedances subtract.
* If you want to add two impedances that are connected in parallel .. you have to calculate with the according conductivity AND their phase shift.
...and if you have a mixture of frequencies .. it´s becoming even more difficult.

And generally:
* For current to flow ... you need a closed loop (I miss here). Without closed loop --> no current flow --> calculations impossible.
* fequency plays a big role for discussion: Are we talking about the impedance of a lod connected to a 50Hz mains grid? Or are we talking about GHz impedances for antennas and wirless communication? .. or characteristic impedanes of cables?

My recommendation:
Do some research online. Lern basic terminology and basic symbols (nothing fancy). Then tell us in more details what you want to do and what you need to know.

Klaus