When you first start the game, you will be introduced to the character creation by Sanae. The screenshots on this article are fully translated.
Then, you will have to customize your team's emblem and name.
You can put whatever you want, it isn't that important since everything can be changed later.
You'll then be able to chose your team's uniform. Sanae will choose the goal keeper and the away uniforms (used when your opponent has the same uniform as you), but you'll be able to customize everything in detail later.
You'll then get your first teammates. For this, the game will grant you 3 free Capsule drawings. Get familiar with the concept of Capsule drawings as you will often see this.
This time, your free capsule drawings will give you some Captain Tsubasa characters, among the famous ones, from the Ootomo Quartet to Tsubasa.
Sanae will bring the rest of the team, which will consist of players from Captain Tsubasa teams, but those who are almost unknown.
Sanae will then present you your HOME screen, where you'll have access to all the game's modes and updates. When you load the game, it'll always bring you to this screen.
For now, Sanae will ask you to choose scenario mode. Do so, then after a while, she will point out the charge button under your play points. Use it, and you'll get more play points. This is the effect of an item called Stamina Drink. However, you'll have to buy niconico points to get those items, so forget it if you don't want to invest money. You'll still be able to win some in other game modes.
After one or two trainings, your character will level up. What Sanae is saying is pretty self explanatory. There is no real good choice. Just level him up the way you want to.
When you'll get a bunch of good CT cards, your character may seem not worthy, and you might want to give up on him. Don't! Keep on training him, with a level cap at 150, he'll eventually have better stats than anyone.
There! With the game tutorial being over, you can now play the game as you want.