Also check out Cole, from Southern Bitcoiner, he's a South African bitcoiner who has some good videos on YouTube as well as a website. The comments on his videos may have some good info as well.
Robosats it's pretty good, you car access it on a Tor Browser and you receive over lightning. Also try Bisq.network, an app running on desktop only and only allow to purchase/sell onchain.
In either case, you need to provide a security deposit in both