I let my son apply to college in his junior year. His close friend did to, and the friend attended UF. My son had maxed out dual enrollment classes, and only had English left for senior year. My son is a STEM kid, so going abroad would not have interested him. There were several colleges that mentioned, in their brochures, that they would look seriously at juniors. Off hand, these were STEM Universities.
What is your son interested in?