That's useful, thanks! I don't think I will need to do that, firstly I should try out all the basic settings. Thanks for explaining the thing with Cura. Is there any other slicer that allows some other modifications of the print settings? I see that in Cura it's possible to change the outer layer printing speed but is it possible to change it's thickness? From, let's say, 0.06 to 0.02?
What is more, giving that there's only one surface I'm taking care of - the upper surface (the element is a button, everything else will be hidden), is it possible to print everything lower that this surface as quick as possible (not taking care of quality) and make only this one surface look good, printing it slow? There's an option for "Initial layer thickness" but Cura says it's not a good option for making it thicker than 0.3 mm.