Another Debian Testing user here, I’ve been running it for I-can’t-remember-how-long and genuinely can’t recall the last time there was a showstopper. My use case is very standard though, no gaming or running servers or heavy development. Recently rolled up to Trixie with no issues whatsoever
My tip would be to make sure of your storage partitioning: Keep all your data entirely separate from system stuff then you can swap out distros pretty much as and when you please. Also: Debian stable, then testing when you’re comfortable