Playing Sound with SD Card Module

Hi to everyone. I am a amateur in Arduino World and I have an Arduino Uno. I want to play sounds from a speaker using an SD Card module. But I have a few questions. How much Ohm and Watt speaker I should use? Which libraries should I use? Will the libraries I am gonna use change according to the speaker I chose?

So that requires you to have the sounds loaded onto the SD card in a .wav format.
Then you need to read the values of the sample part of the .wav file, and modulate them onto a fast PWM signal pin.

This will drive an Arduino pin, you can't connect an Arduino pin directly to a speaker or you will damage the Arduino pin. You need to use an amplifier, sometimes called an active speaker.

As a beginner I suspect that all this will be too much for you to do. A much simpler option would be to use a DF player with built in speaker amplifier.

There are lots on line that will do this.
here is a link to one:-
https://maker.pro/arduino/projects/how-to-use-the-dfmini-player-mp3-module-with-arduino

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