Look up Rick Beato “Perfect Pitch” and “Ear Training” On YouTube. He’s literally the Stephen Hawking of music theory and ear training. And the app that Robert spoke of is pretty decent too
I agree with Ids as well. Getting use to some basic concepts will help a lot!
If you’ve been doing these lessons, try figuring out simple songs on your own. This helps a LOT with ear training. After a while, you can listen to a song and say “I bet this is a D minor chord” and sure enough, you’ll be right!
Syn and Papa Gates love Rick Beato, so he’s a well-trusted source for me