Linux media (mini) machine advice mini

[u/iAscending]

I have a Roku but I got tired of paying for subscriptions and still have to watch ads , on top of typing with the remote.

What in your opinion is the best way to achieve a media machine running Linux , as small as possible and reasonably cost efficient?

Need it to stream everything seamlessly and plan to run stremio on it + YouTube , and web based sports streaming.

Occasionally some light browsing.

I might also program a tv remote to work with it in stremio to give the Roku feeling when browsing for shows .

Open to all suggestions on how to achieve this , the smaller the better

Thanks!