Congrats, you are getting a first hand perspective of a startup; there are no syllabi just a vague sense of which direction to walk. What you describe as "lack

Congrats, you are getting a first hand perspective of a startup; there are no syllabi just a vague sense of which direction to walk. What you describe as "lack of guidance" can also be described as "hands off delegation". The presence or absence of task tracking, feature specs, etc mean nothing right now. Your success depends on your ability to take ownership of the feature, anticipate requirements, deliver the code, and ask for feedback. You've been thrown into the deep end of the pool while your peers who took normal internships are in the kiddie pool with floaties. Have fun and make time to come up for air every so often!