Unknown sourses

I just got a firestick so new to all this. I watched your video for adding downloader etc to add bee tv. When I go to unknown sources downloader, apk and mx player are not there. I tried to download bee TV and it says unknown sources are blocked. I’m confused

did you go into settings on stick an turn on apps from unknown sources to get developer options to come up go to setting then my fire tv then about then click remote a few times and it will be activated then click developer options and turn on unknown sources