"Can you remove the sign from the photo so I can see what is behind it?"

I suspect the zombies won't help your suspension of disbelief.

Find a model that inspires you. But don't start painting that model yet. Pick up some cheap models and practice and practice and practice. Get familiar with the tools, thinning your paints, and just completing a few models. Every single model will bring improvement.

Here's your dreadnaught, in progress: