Just use a custom proxy stack consisting of X25519, chacha20, poly1305 and kyber, which is resistant to quantum computers w/ at least 261 bit encryption (or 6000 bits if you wanna go overkill and create a channel). since you don't need a client and in fact, I advise against it because there curently are no safe VPN providers as they're all written in garbage lower level languages like C/C++/Go (and that includes Wireshark, OpenVPN and Tailscore) and lack full tunnel control. They're garbage. "Proxies" and "VPNs" are not the same thing. And Tor is compromised.