I had heard before that eggshells can be a good fertilizer, but I thought you just had to smash or break them into smaller pieces. The method of grinding them into powder actually makes sense, and it's definitely a more efficient way for them to be absorbed by the soil.

Regarding your gardening, having "started learning this year" means you naturally have a green thumb, because the results look bountiful with all of the vegetables you've been able to produce already. Well done! 👏