Hi.
Probably first have a look at some of the official tutorials to learn the basics.
Then it kind if depends of what you plan to do (game type(puzzle/rts/mmo/platformer/etc... 2D/3D/VR)
I would suggest to join the Playmaker Discord channel.
There you can find many tutorial links and a good community that can help out if you have questions.
You can always post on the forums as well of course