With Jinbes support, you can go wide on the board, applying more pressure through multiple attacks
As long as you know the basics of the game if you dont, you can always bring yourself up to speed somewhat by checking out our how to play Magic: The Gathering article theres few ways to get going faster than by grabbing a pair of Jumpstart Booster packs
I would say that you're better off with aggro rather than lifegain, but I'll give you some suggestions: LANDS Drop the 2 Opulent Palace, get 3 more Blossoming Sands, and you're running way too many lands, I suggest you drop 9, so your deck has 60 cards exactly, more than that will just throw you off your game
Its not the typical Soldier youd think of, but as a Lord that untaps or taps any permanent you like, its a real anchor in Merfolk decks and has earned a spot on this list its a disruptive card and a value generator
[2] A card with hexproof cannot be targeted by any cards, spells, effects, or activated abilities controlled by an opponent
However, there are updated version of the ability rampage that trigger separately
