If your goal is UPS: you will need at least 1,000 hrs Multi-TPIC. The fastest and cheapest way to do that is to get your CFI and fly your butt off until you are attractive to the regionals. Once hired there upgrade ASAP and build time as fast as humanly possible. Once you have your 1,000 multi-TPIC you can consider things like flying for an ACMI to get heavy international experience, upgrading to a OE captain at your regional, etc to better make your resume standout. Additional options to consider: there is an internship program at UPS that supposedly guarantees an interview once you meet hiring requirements. It’s generally awarded to pilots with around 500 hours and lasts a year. After that year they send you off to Ameriflight to build time. However, some interns continued to build time as a CFI while interning and then went to a regional. I have flown with FOs who went both routes. If you are aggressive about getting your hours and make a positive impression as an intern your odds of making it here in your twenties are good.

If a regional offers you a cadet program that speeds your progression into 121 flying: TAKE IT! If they have a flow so much the better. Always have a backup plan or two for your career. Once you have your 1,000 TPIC apply everywhere. UPS hires legacy pilots too and hanging out at Delta, United, American, etc while you wait isn’t awful.

Remember, we are relatively small. You can do everything right and never get a phone call. That doesn’t mean you are a failure.