It's not impossible to go directly to Sevan. As long as you are the principal, anything is possible-
I have also studied Qian Yi. Sevan also has Latin American teachers (high level), but I can guarantee that they generally have no accent. Although he speaks the local accent of his own country, he can generally speak pure Castelhano. In Sevan, my Bolivian uncle B 1. 1 has a much more correct accent than Spanish Andalusian aunt A2.2-.
Don't be superstitious about the efficiency of foreign teachers. For example, some foreigners, although muy responsable, use more new words to explain a new word and won't let you use the dictionary. Can you accept it? Remember to start with a Chinese teacher.
Besides, you don't have to be in Spain to speak Spanish fluently. Some children's shoes are not only better to listen to, but also full of loopholes-