How to instal apps on android tv

Hi guys, I need your help, I have a realible internet connection and I also have an Android TV, now playstore has some very limited apps and I was looking for a way I could download apps for streaming movies for free. I managed to install Kodi but it’s interface is not that good.
Are there any good apps I can use and how do I install them on to the tv

get a way to download filelink store here is the website https://www.filelinked.com

then go to youtube and search fore filelinked codes …

Install apps on your TV by sideloading them through your IP via your laptops adb commands

jst search any app on google 4 streaming movies,Documentaries & Cartoons try REDBOX TV.APK on google then MX PLAYER.APK