Hi, I am happy to have found this forum
I was lost between the programs and I’ve made with Zbrush
but how much time need to become a professional, and be capable of modeling anything?
because I’m new in 3D, and time is important to me
Thank you 
That’s a question that has no real answer, simply because everyone has different learning abilities.
If you want to “become a professional, and be capable of modeling anything?” then I think years is the answer, and even pros rarely know everything because software and workflow keep changing. But if you just want to get a decent knowledge of ZBrush, it is possible to get the basics down in months and then just build on that. Learn to walk before you run.
It would be a benefit to also learn basic hard surface modeling in another program, just so the discipline and structure of things becomes familiar to you.
What Dillster said, with one change. Are you a sculptor? Do you already understand form? If you’re not already a decent sculptor then that is what you actually need to learn. Using Zbrush isn’t all that bad, most tools and systems can be learned and even mastered in a 2-4 weeks.
Learning how to sculpt though…that can be years.