Welcome aboard!
ArniLand;
Welcome to the forum!
"Scheme":
The "'scheme" or "track plan", as we call it, is small, and simple. That's good for a beginner as you will be able to build it relatively quickly, but I agree with CTValley that you may get bored with it since you can't do much more than run a single train around a loop, and park & pickup cars from sidings. That last thing, being able to deliver, and pick up, cars is a step above many beginners track plans though. It does give you a little ability to operate your railway somewhat like a real one, which can help sustain interest.
The main problem with this layout is its small size. If you could expand it out longer, perhaps to an overall length of 2m-3m then you would not have track crowded in everywhere. That would leave more room for scenery, and buildings. Which will make the layout look much better.
Still, if you don't have enough room to expand the length of the layout, it's OK as it is now. I would say go ahead with it, but make it longer if you can.
Running two trains with DC:
Running two trains with DC control on this small a layout is not practical, especially for a new modeler who is just starting out.
Using DCC control would greatly simplify the wiring, and would make it easier to operate two trains. I recommend using DCC control.
However, the small size of this little layout means the two trains will need to be very short trains, with only a few cars each. They also won't have room to go very far, so the illusion of a train traveling a long distance, from one town to another, will be difficult to project or sustain. You will need to use a lot of imagination!
So, for learning the basic mechanics of building your first layout,this layout will be fine. A longer version will look, and operate, better, if you have the space for it.
Equipment:
Using DCC will mean using a DCC controller not the DC controller you have picked out.
The switch control will work with "switches" (we call them "turnouts") that use twin-coil solenoid mechanisms ("switch machines") to operate.
If you choose to use DC stall motors, or servos, as switch machines to operate your turnouts, you will need to use different electrical switches to control them. If you know enough about electrical controls to make your own turnout control panel (see photo) you will probably save some money, and learn from the process. If you don't want to do that, I would use turnouts with twin-coil machines. The British brand Peco is an excellent turnout, and can use a twin-coil electric switch machine, or simply be operated by hand. If you choose to hand-operate the turnouts, you won't need any "switch control" button unit at all, or any wires between that unit and the turnouts. This will save more money, and simplify construction.
The PDF files attached below the photo, have more information.
Good luck, have fun!
Traction Fan :smilie_daumenpos:
View attachment WHERE DO I START rev 4.pdf
View attachment All AboutTurnouts rev 5.pdf