BTC Session BISQ tutorial probably has what you need (https://youtu.be/4LyEKA5Iq9I?si=jjuMCGUL5b1uegdw)
I would also suggest looking at Robosats as an alternative (I prefer it over Bisq). For this you’d just need to download TOR browser (https://www.torproject.org/) and then search “Robosats” will running TOR (I works just like a normal browser), you’ll find their GitHub (https://github.com/RoboSats/robosats) which has their onion link (RoboDexarjwtfryec556cjdz3dfa7u47saek6lkftnkgshvgg2kcumqd.onion) which should be opened in the Tor Browser.
You can find a helpful BTC Sessions tutorial for Robosats here (https://youtu.be/XW_wzRz_BDI?si=5Tuu7p3kganffZp_)