If writing a new article, consider writing up a draft
And most importantly: Pull up a goat and have some fun!
While you are free to continue to edit as, and be identified by, your IP address, you might prefer to create an account (they're free!), or log in if you already have one. If you create an account, your IP address will not be displayed and you will face fewer editing restrictions.
In order to prevent unnecessary server load, edits should be kept to a minimum. Please experiment in the template's /sandbox or /testcases subpage, or in your own sandbox, and consider discussing your changes on the talk page before applying them.
Editing a template causes all pages that use the template to be re-rendered. If the template is used often, this can put a lot of load on the server since it fills up the job queue.