Hey Y3ldarb…

so its kind of a tough question, cuz yes it is possible to make things have a more vintage frequancy response it is hard to mimic the gear they used at the time, mic quality and technique has come a long way since OT… Im not sure how much you are able to do in DR17 and Audacity but a few techniques that i would try first would be

Eq- so most old films dont have a very large low end so rounding off some low frequencies might get u in the right direction
vintage fx- there is a software vst called “rc20” or “vintage strip” there are others like them but they are made to emulate old tapes and analog gear so tweaking with some presets on a audio plug in like those will also help put u in the right direction…

3 referencing- while attempting to emulate old sound it is important to have a solid reference point to work off of, whether that is a scene from the OT or something of that nature

sound replacement- you can find a ton of old vintage star wars sound fx out there… replacing some important sounds such as lasers or lightsaber sounds with the old ones from the OT and even the old music scores (the ones recorded for the OT) will also put you 1 step closer to achieving what ur going for…

hope that helps