Nice summary by Trump at the start of the video:

Hearthstone is a simple card game that requires quite a bit of an investment to become fun. At least thats in contructed. Since arena is (was?) such a hard mode that made the game in my eyes not really noob friendly enough to recommend starting anymore. Now however arena gets some long needed fixes, which means if you are into draft modes, I can't recommend Hearthstone enough. Its a simple game at its core, so you can even start getting into draft modes here.

If you want to start, here is my referral link for a free pack: https://battle.net/recruit/2QTQXMHLP7?blzcmp=raf-hs&s=HS&m=pc

And this website: http://www.heartharena.com/offers an excellent draft assistant tool that helps you get familiar with the cardpool. If anyone wants to add me without referral my battletag is FreeBird#2749

For the people familiar with Hearthstone arena: What do you think of this? I love how we get rid of the terrible cards. That will make Warrior and Druid in particular pretty good classes. The card bans are a bit weird. You can see they believe Paladin to be the par for all classes, but I think they could have lost a little something from their common slot at least probably Minibot (although that one has gathered a bit of "iconicness" overtime) or Blessing Edit: Seal of Champions like Trump suggested in his video.