Your application and portfolio reached Saul.
He reads everything that arrives. Reply within a week, sometimes faster, sometimes a few days more if a seminar runs long that week. The reply will come from saulnassau@protonmail.com.
If you do not hear back within ten days, write directly to saulnassau@protonmail.com. Sometimes a portfolio gets caught by a filter or an attachment fails.
If your portfolio was too large for the form, send a Drive or Dropbox link to the same address with the subject line Leizu portfolio · your name.