Setting up Morarable using Testnet [ I CLONED RARABLE IN 24 HOURS pt7 ]

I am up to part 7 of the tutorial.
i have a query in regard to making the morarable project using a testnet. Its difficult to understand how to do so when the tutorial is outdated.

you have to provide exact info about the problem that you have, there could be multiple issues considering that it is an outdated tutorial and a lot of things changed since that tutorial was made