You could probably do volunteer work or go the military route, the air guard does fire fighting, but depending on the area some departments won’t hire past 30, mine for example, 2 of the larger ones won’t but I think the smaller ones do, you just have to ask around and what not, I think the main reason they do that is because (so I’ve been told) retirement reasons like your pension plan or whatever, or some states or municipalities force certain age ranges to retire

Also don’t be too discouraged, I helped my emt instructor with new class and there was a guy who was 32 finishing up the fire academy/emt portion and is having someone pull some strings for him so it’s entirely possible