If you're getting started with blender, I highly recommend going through blender guru's donut tutorial. He covers a lot of stuff in that tutorial that can help out someone with zero blender experience.
His other totals are helpful too, the anvil and sofa one.
A brick is the kind of thing that's so deceivingly simple, that you really need to focus on the details, which means if something is off by a little, it's not very convincing.
That's exactly how to get better at Blender.
Fuck around and find out (how to do things).
Depending on your specs, and what you're trying to learn next, dive into simulations, geometry nodes or basic rigging/animation. You'll have tons of rabbit holes to dive into.
I also suggest looking into Ian Hubert's Lazy Blender Tutorials, they're all 1 minute videos giving you hints about the workflow from idea to rendered scene. Great for practise without blatantly copying all steps from a video.
Oh and grab some free textures from Quixel, Poliigon or Polyhaven. Procedural textures are cool and all but there's nothing like photoscanned textures if you're looking for realism without spending too much time hand-crafting shaders.