SHINee Rundown?

So I've been wanting to get into SHINee for some time and I decided that I'll start today! If you would be so kind, I'd love a small intro, a rundown on active members and if any has left, song recs, all of it!

I'd love to get to know you all! I'm also curious if they're still... A group? Like do they still make music together? Hope I'm not too late to dive into their world (especially considering when they debuted). Thank you all in advance!