Massachelo,
The conversion is quite easy but the bureaucracy sucks big time!
I started the process last year in September at GER4 (São Paulo), BIG MISTAKE!
Those bastards lost my process and it was only found because I paid a despachante to run after those lazy @ssholes.
After transferring the process to Curitiba, things seemed to work out until the moment Aeroclube do Parana sent the a/c to maintenance. After all, I had the chance to make 1 flight and head back to Europe.
When I finally got the authorization for the check ride I learned that the a/c suffered an incident and would be out of service for months. More money spent and finally got the chance to have the check ride with an examiner from Aerocon.
I would suggest you to go to Aerocon (Bacacheri), although it is a Seneca I, it was much nicer to fly and had a nice intercom instead of hearing the unreadable messages throughout the speaker.
My license arrived by mail 2 weeks ago. Its a long journey but in these times, I believe it's worth it.
all the best!