Wasabi wallet is horrible for OpSec purposes, I just don't understand why it is "reviewed" (read, "advertised") here. Wasabi has partnership with Chainalysis company which does a background check on your btc coins before they are accepted into the Wasabi's mixer. Furthermore, Wasabi's mixer is...
You can even run a Monero node on your android phone. Search the internet for it, there are a few github links. Enable tor-address for your monero node on your phone, and then you can connect to your own monero node over tor using feather wallet inside WhonixOS or something like that.
I would argue against touching btc at-all. Never use btc, not even for "exchanging" it to XMR. Btc is horribly traceable, and with its current transaction costs, it is prohibitively expensive (not to mention it is slow as *****).
Just buy Monero directly from your local monero dealer on...
Using Whonix qube under QubesOS is one of the most secure ways of doing darknet stuff. Most secure, considering the methods that are in reach of the general populace.
Consider running the whole thing inside a coreboot-ed/libreboot-ed or otherwise IntelME-neutered laptop over a public wifi.
Thinkpad x230 is one of the last line of Thinkpads that can be coreboot/libreboot'ed. Generally, the Thinkpads of these kinds are old, like 10 years and more. Thus, their *****Us are 3rd gen intel or even older.
Thinkpad x230 has the best intel *****U that can also be coreboot'ed. (Disregarding the...