Calling anyone in USAF or recently discharged for some general info

I have a relative interested in joining...I'm retired, so I can give some, but I retired 10 yrs ago, so wondering how much it's different in different ways now vs then, like

- How does applying for enlistment go...in my day, you took the ASVAB (similar to SAT) test and answered some general questions about yourself to determine general eligibility and esp what jobs you qualified for

- What's a typical overseas and/or stateside tour length? In my day, overseas varied from 2 to 3 or 4 yrs depending on where you went. Stateside could be longer, but in general as I recall it was 4 yrs ish give or take for most

- Are EPRs and promotion processes similar...I recall EPRs went from a 0-9 scale to a 1-4 scale I think, and promotion was based largely on two tests you took, one about job knowledge and one for general AF knowledge, plus points for your EPRs, medals, etc

Anyone who's been in a long time and has any other general observations about how it seems to have changed recently (repeat, recently...I don't care how it changed from for ex. from 1960 to 1980 because it's irrelevant to my relative's possible joining) also appreciated!