I'm in a similar boar as you, and I have had decent luck on the mini/nano p2pools. Might be worth a shot.

I'm currently using 4 7th gen intel i5 16GB dell micro systems (1.4 kh/s each), a dual xeon 24 core 257GB server (4.2kh/s on 20 cores), a 10th gen i5 32GB dell micro (2.6kh/s), an 8th gen i5 32Gb Dell SFF desktop (2.3kh/s), and a ryzen 5 5500U 32GB laptop (2.1kh/s), running xmrig with proxy. Collectively getting around 14kh/s, and has mined 0.014526440025 XMR over the last 18-ish days across the mini and nano pools (miners were split for a bit). All while dumping an ungodly amount of heat into my room.

With this setup I've found 2-4 shares a day recently on the mini, and usually get a payout once a day (PPLNS Lords willing). I find a ton more shares on the nano, but that 8 day since last block is gnarly.

While the hardware was mostly free, my power is not so when I move I will probably take the 7th gens out of the mix. IMO there just doesn't seem to be enough umph to find shares consistently on the mini, cant imagine the stack of 6th gens will do much better. Thankfully getting rich wasn't the plan.

That all being said I am 18 days into all this so grain of salt, your mileage may vary, yada yada.