Hi zamorano, I think right now your lighting skills are actually surpassing your modeling. So as a new Maxwell user, you're in a very good position.
I think if you want to add some believability, the "next level" would be to start making sure none of your objects has a hard edge; perfectly crisp edges do not exist in the real world. Fillets/bevels everywhere!
I also think your textures are a little flat. For example, none of your wood objects seems to have bump maps, but we know in reality no wood is perfectly smooth.
observing setup with this stuff and really bump with 0.
I'm rendering the scene again deck and once you are finished post update.
I have a new project underway and will be wary of their tips on edges of objects.
insert a little bump in the wood texture.
In PS I applied noise reduction, selective color correction and lens.
over time will enhance the use of textures, making my images better.