Gotta reiterate Fangs’ comment:
Best advice on getting to a Legacy ASAP, is to grind as hard as you can. Don't take the summer off. Get your ratings and 1500 hours as quickly as humanly possible.
Probably in no other field of endeavor is there more return on initial deferred gratification and initial investment than airline flying. Getting to a legacy one year earlier is good for (in 2026 dollars) about $25-30K a year from that day until you turn 65 and about $500k that last year. Your ticket to the majors is 121 hours and in particular 121 PIC. If that’s important to you you’ll forgo “gap years”, Spring Breaks, and similar nonsense and get a degree, your ratings, and ATP eligibility as soon as possible. Is that necessary? Of course not, but if you don’t you will always be trapped in lag behind those who do, barring marrying the airline CEOs daughter or some such 😉.