You’ve got the design, you’ve got the parts. Now to build the Mosaic!
This is, I think, the truly fun part of Lego… getting to build with it, create some wonderful thing and see the 3-D thing before your very eyes.
The first issue we ran into was having the design to follow for building. We don’t currently have laptops, it’s all desktop and tablets around here. Nor do we have a color printer and a black and white set of instructions isn’t so useful when working with several colors that are very close to each other.

In Stud.io, you can render the design and then print the resulting picture (jpg or png or other file format). Of course, if you can bring your computer to where you are building, or vice versa, you got it, because bricklink.com has a view in the My Baseplate that is very nice to build from. By clicking the “step view” you have the ability to select the piece you want and see where it is in the design. Here I have “2×3 black plates” selected and those are highlighted in the design.

This view does also work on a tablet. You use the browser to open it and view it, via the bricklink.com My Baseplate, select “step view” and then select pieces as you build. I found that I could zoom in and just build from the picture (that is the normal 2-finger zoom on touch screens). A single finger could rotate the view, and 2 stationary fingers side-by-side can move the view up/down and side to side.

I’d love to hear if you are working on a mosaic. What of? Where you are you getting hung up and we can answer some questions?