Back in March (2019), I wrote a general overview of the game. Most of the information can be found in these new tips, but if you want a nice read of the game as you're getting started, CLICK HERE.
It covers just about everything you need to get started in the game. Instead of retyping it all, I decided to just link to it. It covers lots of stuff that you'll need to know up to about level 9. More specific things can be found in these tips, though, so check them out after you've read that. Or don't read that and just read these other tips. Or just click on things randomly! You do you! Most importantly, have fun!