You are likely looking for the "Current SE Build 2.0.20" (dated 2021). This works only if you have disabled automatic updates in Steam and have not updated to the Anniversary Edition.
Installing SKSE for Skyrim 1.147 (2021) is a straightforward process. Here's a step-by-step guide to get you started: skse for skyrim 1147 2021
) must be updated to their specific 1.6.1170 versions or they will cause a "DLL Incompatible" error on launch. Installation Highlights You are likely looking for the "Current SE Build 2