[Observation] Our current onboarding is too hard at the moment

[ggolcher]

Talking to customers and with my own testing, I've found the following issues with onboarding:

1. Switching to a Web3 wallet browser on mobile is counterintuitive
2. We don't do a good job indicating to a person that they need to install a mobile wallet on desktop
3. We don't provide enough instructions around how many times somebody has to sign, why, so forth (step-by-step)
4. We don't communicate properly that you need to set to Rinkeby
5. We don't overall provide enough feedback on what's happening, and links to how to recover from any deviations from the happy path