[GateHub] - Onboarding needs to be revisited after GateHub Sandbox integration

[Tymmmy]

Context

We currently have an Onboarding that explains what needs to be done for adding play money and such.
After integrating GateHub sandbox, we need to revisit Onboarding to make sure all info is accurate.

Todos

• check Onboarding steps and make sure everything is correct info
• make necesary changes for the steps - Add Money - Accounts - etc.