Need help with noisy remote interviews—what's a quick fix?

So I'm in the middle of building a weekly series, and every time a guest talks remotely I end up with that infamous hiss, the occasional bird‑song, and my own voice overdubbing in the mix because the levels on Zoom were a mess. I've got all these raw MP3s in my Dropbox, but I'm tired of hunting for a fancy plugin solution—just want a straight‑up recipe that keeps the dialogue clear and removes background hiss without wasting days tweaking settings.

I've tried a few tricks so far: I pulled a compressor with a very slow attack to let the sudden chatter through, then tossed a mild EQ filter at the high‑end, thinking that would dampen the hum, but it barely cuts it. Also, the recording software keeps defaulting to 44100 Hz; maybe that explains the glitchiness, or maybe it's just that all the remote tools add a layer of noise I can’t peel away.

What are the easiest steps to get a solid clean track? I'd love a workflow: what format should I export from Zoom? Is there an OS X/Windows preset I should use in Audacity, or do I need to rent something from the local radio station for a quick pass‑through? Any short‑and‑sweet guide? And a bonus—how do I keep my session running fast, given that I'm a bit of a deadline person and the creative energy fizzles if I spend more than an hour in a sound‑check loop?

Honestly, if anyone else's heard my attempts sound a bit like a radio jingle gone wrong and has a killer quick fix—drop it below. Thanks!