Latin America North is one of the three cheapest shards on the board, and it delivers the best Blue Essence per dollar of anything outside Turkey. If your priority is unlocking a large champion pool for the least money — for practice, for a friend, for a second account you do not intend to take seriously — LAN is where that maths works out.
The shard itself plays fast and aggressive. Lane phases are short, fights start early and often, and games tend to end before the forty-minute mark. That makes LAN an unusually good place to practise a champion's teamfight pattern, and an unusually bad place to practise slow scaling. Play to that and the shard rewards you.