Hello, Clouds, and welcome to Storylark!
The first step to publishing your work is upgrading your account to author status, which you can do by clicking going to "Settings", clicking the "Upgrade Account" button, and pressing the button under "Author" or "Seller". Becoming an author doesn't require any approval, so you can immediately proceed to actually creating your titles and issues. You can also become a seller - for that, we need just enough information for processing payments.
As an author, you'll find a new tab on the top bar, labeled "My Titles". From there, you can click "New Title", which will take you through the step-by-step process of creating a title. Once you have a title, you can start adding issues, which are the individual comics you can upload. You can do this by clicking the title's "Edit" button, and then going to the "Issues" tab. From there, you can edit old issues, or add new ones - the process is similarly step-by-step, with guides along the way.
You can also look at an illustrated guide to publishing comics on Storylark at: https://storylark.ph/titles/the-storylark-manual
Do let us know if you have any more questions, and happy publishing!