I use the one shipped with Android Studio, you can use it with the command line to make it lighter...
https
/www.androidauthority.com/best-android-emulators-for-pc-655308/
Nevertheless, you have a pretty weak machine for emulation, you'll probably be scraping the maximum RAM just by running your Windows/Linux system, so any other OS will laggy af.
Probably the best option is to get more RAM.