
For eggs and suggestions.
can you share your references… I found your desk a bit cartoonish with these drawers size and spacing.
I also think your mug/caffee cup is too longer in Y axe.
Maybe you can add a plug on the wall with cables. If you have a computer and a lamp it’s better if you power them up.
In this case i don’t use any reference. In fact, in my childhood i have desk like this, but without shelves.
Can you give some advice how i should done with the printer? Should i give some details by adding a more faces, create holes and etc. or i can simulate this stuff with textures?

Well in that case you should use references. Without them you wont be able to achieve your goal. It that simple