You maybe in for a rude awakening if your interview is scheduled outside your expected timeline. It’s not written in stone as to when you will get an interview date and while you’re enjoying your vacation outside the country, it would be such a bomber to realize that you missed an interview appointment. My sons had their interview within 6 weeks, my sister got hers in 4 weeks after applying!! Things change for different reasons. If your vacation is not going to be a long one, go ASAP rather than later. If you can’t, then hang on. The opportunity cost may not be worth it. Timelines change.