Yo, I’ve been down this rabbit hole too. Free Los Angeles SOCKS5 proxies are rare, but I’ve used HideMy.name’s free proxy list before. They update it regularly, and you can sort by location.
For testing, I just use a simple ping test or check if it works with my browser. If it’s too slow, I move on. Hope this helps!
For testing, I just use a simple ping test or check if it works with my browser. If it’s too slow, I move on. Hope this helps!