The people were incredibly nice and helpful, and I learned so much just by working there. Everyone was willing to answer questions, and I felt welcome throughout.
What I wish was different
The onboarding process was very intense with a lot to learn in the first week - I wish the whole process has been more gradual.
Advice
Don't be afraid to ask for lots of help and experiment with the codebase - the best way to learn is by tinkering with the code.