If you have the money this thing will do everything you need.
Up to 4 microphones, all the real important filters (noise gate, de-esser, auto level, compressor, reverb) and can mix directly to SD card or USB card. This has the lovely auto-mixer function which I think you'll enjoy a lot. you can or perhaps even should also stream to PC or mac for a contiguous recording, audacity is free.
I strongly prefer cardioid microphones for these types of recordings. Or a high end head mounted directional microphone But money becomes an issue here. Lavaliers can introduce a lot of background noise due to sensitivity. They tend to be used only for conferences where people want them to be invisible. I prefer "Madonna" style headworn microphones over those. I've mixed theater and used the eyebrow mounted microphones but those takes a bit of convincing of a casual person to get used to.
for podcasts I like cardioids, they have a bigger moving coil, they will sound much better. I'm pretty strongly biased towards shure and Sennheiser microphones, good stuff even at the entry ranges. For stage work a dpa 4166 is hard to beat but now we're getting up there in the price ranges.
Or a Taylor Swift style studio mike like the m49, but now we're really getting up there
https://www.bhphotovideo.com/c/product/1722602-REG/neumann_008686_m_49_v_set.html
Personally I tend to want to either record every microphone separately or filter at the source. I find it incredibly hard to filter noise when all channels are mixed together. Sure you can try to clean it up in software but I think it's harder when all mikes are mixed together. SW in post can only realistically do so much.
I have the exact same feedback above for the overland journal podcast. They struggle with not having a compressor on their source and it shows as the audio goes from high to low a lot. And they would benefit from a touch
DPA has a good writeup on microphones.
This guide will inform you how to ensure optimal voice miking. We address microphone technology and characteristics, vocal microphones in practice and more.
www.dpamicrophones.com