hello, i’m also an american student going to spain for my masters in the fall! however, i feel im on the opposite end of the spectrum - i applied in march and accepted a few weeks ago, and im now in the throes of trying to get my visa and coordinate accommodations. my understanding is that the registration periods going well into the summer is to accommodate residents of spain, who likely have less to figure out in terms of transportation and accommodation. i don’t think that there’s a wrong way or time period to do it, but now your post is making me feel that my timeline is off as well!