I don’t use a mixer but there’s another way for privacy if you want, easy to use:
Take a Lightning wallet like Phoenix (it supports Bitcoin and Lightning):
Buy from an Exchange, send it on your Phoenix Bitcoin Address, then in Phoenix to the Lightning wallet….
after that use a service like boltz (changing from Lightning back to Bitcoin/Main Chain)….
Send it from Lightning (Phoenix wallet) to boltz and via boltz to your Bitbox02 Bitcoin address.
It’s simple and good.