10 chapter book due in 5 days?

Oh well…

I have a very little working experience with someone else's code, and even lesser experience working with a professional code base. All my previous apps had around 8-9 java files at max, with very rare moduling and folders.
And this start up where am currently the intern, has handed me theiir develop branch, it has almost a 100 java files, 50 external libs, massive use of architectural designs ,data binding and custom views and so much more ! Damn, am overwhelmed , but so excited to learn the practices i was procrastinating for so long 💗💗💗
The only problem is lack of a mentor, since the sir who made this beauty is a superman who is currently handling the server and ai side and isn't usually available.
But i guess i will do fine, hell it's a FBI's data key in my hands :D