OH my DaniloDantas... I'm not saying it can't be done but there is a huge support community behind Joomla...
I've spent sometime over the last couple weeks to find something "better than Joomla". Something that doesn't need so much tweaking out of the box, something that once you turn that key doesn't have every option turned on and then makes you spend the next couple wasted hours turning things off and customizing it. Just so I can make a site that may never grow beyond 20 pages or utilized by the client.
Your best bet would be to check a freelance site. Most if not all Members here have little time to do jobs on spec.