How long does it take to ramp up?

Do your tasks have due dates? If not, ask your manager to put due dates on them.

...and I often need to ask my buddy or someone else for some help. Is this ok or am I underperforming?

If your team isn't super mean, this is perfectly normal. It's literally just your 3rd day. Your goal though is to make sure that your need for help drastically drops over time due to following the advice here: https://www.jointaro.com/course/ask-great-questions-that-get-great-answers-quickly/learn-to-fish/

Needing help isn't inherently a problem. Needing the same type of help in the same amount over and over again is.

hope to get some advice on what’s considered normal so I know where I am at! I have 2+ YOE.

It really depends on the startup. If it's a tiny 5-engineer company, the expectation will be much higher for you to move fast and become independent. If it's a massive unicorn with 500+ engineers, the expectation will be much lower as companies at that point are more like Big Tech than tiny startups.

If I had to throw a number on it, I would say you should be operating at 90% productivity compared to a similar engineer of your level after 2-3 months. But again, I could be completely wrong based on what kind of startup you're working for.