"It's never too late" applies to long-term holders, but you'd think again if you were an active trader. Regardless, a bear market is the best time to restart trading by accumulating on several support lines.
I want to start trading again. Could you please give me some advice so that I don't go through things like a few years ago.
If you store your assets in Trezor, that means you are not an active trader. Your only problem is that you lost your hard wallet. I don't know how that happens but you have to prepare something so similar events can be handled like extracting private keys or seeds separately in a "safe" place (offline).