ez? :) https://plugins.audacityteam.org/
Plugin formats supported by Audacity
Nyquist plugins
Audacity has built-in support for Nyquist effects on all operating systems. You can download additional Nyquist plugins, or create your own using the Nyquist programming language. Nyquist code can be conveniently tested using "Nyquist Prompt" under the Effect menu.
LV2 plugins
Audacity has built-in support for LV2 plugins, which are an extensible successor of LADSPA effects. LV2 plugins are mostly built for Linux, but Audacity supports LV2 on all operating systems. To install LV2 plugins, place them in the system LV2 location then use the Plugin Manager to enable the new plugins as in the plugin installation instructions.
VST plugins
Audacity can load VST effects (but not VST instruments) on all operating systems.
VST3 plugins
Starting with Audacity 3.2, VST3 effects are also supported on all operating systems.
Audio Unit plugins
On Mac OS X only, you can add Audio Unit plugins to the system plugin directories.
LADSPA plugins
LADSPA is superseded by LV2. These plugins are mostly built for Linux.