What's the best deck for a "beginner" -- I've played the real card game for an appalling number of years, got into this app a week ago*. Currently I'm running what is essentially a "beat you up because I have high attack so suck it" deck.
*I haven't had time to unlock everything yet
2x Wattaildragon
1x Trance the Magic Swordsman
3x Telekinetic Shocker
1x Jerry Beans Man
3x Master Kyonshee
3x Neo the Magic Swordsman
1x Black Pendent
2x Sorcerous Spell Wall
2x Double Summon
1x Shield Spear
2x Machine King - 3000 B.C.
Skill: Switcheroo (as bandit, farming for metalmorph) or Beatdown (as Kaiba, starting character)
No real advice on the deck for you, but I started with Kaiba too, I suggest you play a lot of Yugi Atleast until you unlock the "Destiny Draw" Skill. With that Skill it is very easy to begin farming Legendary Duelists to get cards that make your deck more competitive like Econ, Champs Vig. Camp Ranked PvP for 100 wins and take advantage of the SR tickets you can get, pick up Econ with ease
I'll probably grab Enemy Controller before too long -- super versatile card, I use it in my IRL deck right now.
I don't think I'll go for Champions Vigilance though, I don't use lvl 7+. It might be OK in a future deck, perhaps heretics? I'm not sure which cards are and are not in the game.
So coming back to this, I've upgraded my beatdown deck with some pretty good backrow (finally got a mirror wall! Had to buy nearly the entire box XD), and created a second deck which is based around Nuit, Red-eyes (since I got 2x spirit and 2x red-eyes), and a couple rituals. Trying to rank up to Gold 1 right now :)