Hi Maria Cristina,
For help getting started, please read up on the freelancer resources for great tips and insights on how you can work successfully on the platform. For more information about working safely through Upwork, please read these tips for avoiding questionable jobs.
Welcome to Upwork, and goodluck!
Welcome to this arena.
Creating a profile needs your step by step professional 'following' through the system at Upwork. I see you have already created a profile here. But it lacks many things to be considered as professional.
There are many things yet I would like to suggest the following:
Best of luck!