Hi Jose Antonio,
As input devices, a mouse and a tablet can be used.
This is a general question; let me try to list all places where one can draw.
Like in Illustrator:
https://help.maxon.net/us/index.html#TOOLSPLINEPEN-MDATA_MAINGROUP
https://help.maxon.net/us/index.html#TOOLSPLINESKETCH-MDATA_MAINGROUP
As well as with any Spline tool, with options in the Main Menu> Spline.
Not that these Paths (Splines) have no color assigned to them, that can be done in
Sketch and Toons, or just with a Hair material.
If you are fast in Illustrator, perhaps check out the CV Tools>CV-Art-Smart.
However, if you want to learn Cinema 4D, try to focus on what you can do inside the app while learning. Otherwise, you might end up using Cinema 4D only as an authoring app. It is better to know both the authoring and the creation options.
There is a Doodle option given, but it is more to sketch or make notes.
Main Menu> Tools> Doodles.
If you like to paint on objects, the application that resembles Photoshop is very close, but targeting 3D predominately is BodyPaint3D, an integral part of Cinema 4D.
When you go to the right upper corner of the interface: Layout> BodyPaint 3D.
It has layers and many things in common with Photoshop, but as Illustrator, Flash, or Photoshop, each has a different target. Like you would compare Ps with Fl. There are significant differences. To know them and when to use what is a question of understanding the applications in detail and evaluate if the advantage is worth the time to go from one to the next application. With around three decades of using all these apps, I would have no usable general reply to this: It depends on the project.
Working like in Flash, that is more like all the splines animated. Whereby the splines might be best used in Generators (Main Menu> Create> Generators), like Extrude, or Loft, etc.
Generators are the object with the dominating green in it. Animating splines means to change the point values over time, which is done with the aid of the timeline, something that will look familiar to Flash. However, try to explore it as it is, and not searching for the equivalent. To duplicate another application with Cinema4D’s toolset is using only a portion of its power.
If you have a question, please share the Ai, Fl, or Ps file in a new thread, and I will share what I know of how to duplicate it.
If the question was meant, is creating a 3D object as simple as creating 2D in Illustrator, Flash, or Photoshop? Yes and no! If you like to make a cube, that is a click only; if you want to create Pixar movie like film sets, then, of course, it is not. With anything between.
Project files must be zipped.
Please note that for security purposes, I click only on cloud services from DropBox, Google, Amazon, Apple, Adobe, and Wetransfer. Videos with Vimeo and YouTube are fine. I ignore shortened URLs.
However, if you have a file that is too large or needs to be “not in public”, I can set up an upload link.
I’m happy to look into any questions you have regarding Cinema 4D.
Cheers