I used to obsess about creating GitHub organizations so projects I started wouldn’t appear to be only from me. Big mistake.
GitHub pulls non-profit status when it feels like it. This happened to me with SKILSTAK and I almost immediately lost all access to all the repos I created under the organization. Whether or not this is because of some requirement on their end, it doesn’t matter.
Organizations are expensive. They cost money. Personal accounts don’t.
They don’t show off your accomplishments. This is a big one for beginners. When people are ranking your profile, your organization participation isn’t weighted the same as what you have done yourself. Plus, the fact that you took the initiative to create the organization in the first place is really buried under other information.
You can always move to an organization later. When and if the time comes to move to an organization, say you have a ridiculously popular project that is virtually impossible to manage, you can off-load a lot of that work to a full project team.