Helping high-impact orgs can be high-impact.
Whether that is through IT, HR, or providing food.
Not everyone needs to be a high-level researcher, and I think it is fine to list jobs that have very different skill requirements than the typical 80k-advertized job.
I think applying to EAG makes sense in your position, but do not be too disappointed if your application will not be accepted.
I recommend applying for an EA summit or EAGx too! For example, EAGxSingapore might be a good fit, and it is closer than NYC: https://www.effectivealtruism.org/ea-global/events/eagxsingapore-2026 EAGx and EA summit have a lower bar to entry, and many people first attended an EAGx event before attending an EAG event.
Maybe you should inform yourself a little bit more about EA principles before going there, but you do not need to have expert EA knowledge to attend. Regarding your Oikko project, you should be open-minded when attending EAGx or EAG, maybe other participants will try to convince you to work on completely different projects instead.