Where Should I Start to make my own Swift Library? [on hold]

Iv been developing Swift for 1 Year now and I feel like I have fairly good knowledge of the language.

Now I am wondering where do people start when creating a large open source project like AlamoFire or a small custom button/animation library for others to use?

Iv tried looking for some kind of "build a small swift library tutorial" but noone are around.

I realize this may be a broad question and I am not looking for a A-Z list. IF you can give me the main points I need to dig into and what I need to think about before attempting to create it that would be amazing!

Thank you!

Maybe you can work on some other library first before start your own. If you believe you can add value with your lib, try git(hub) for (uploading and downloading) open source projects. You could be amazed by the progress in the upcoming year. Usually the growth curve can be exponential once you have a solid base. Hope this helps.