The beginning of your journey will mainly involve cards that can come in Play Boosters, the game's traditional card pack that can be found in any local store.Opening boosters is fun, but there is no guarantee that you will pull the cards you want
Blue has access to a ton of powerful cards for Commander, so you can make your Gogo deck as janky (Bracket 2) or as deadly (Bracket 4 or 5) as you want
For Yshtola, it came down to a mix of popularity of the character as well as being a spellcaster, her story and character development offered a wide range of abilities and moments to pull from to lead the deck
Now, Vivi starts with zero Power, but that will quickly change, as it gains +1/+1 every time its owner casts a non-creature spell, while also dealing damage to an opponent
Unfortunately, the fact that these appear to cycle for two mana rather than one rules them out of the same conversations