AKA: Where Should I Start RPing?
There are lots of friendly people on the channel so you could start by paging one of them or asking on channels. There are also ways to see who is a connected member of the sphere (+swho or +fwho).
The Hedge has many places where one can rp. A listing of grid hedge gates will eventually go here. There are many landmarks. There is a Goblin Market.
Sphere_Hangouts has a ongoing list of changeling friendly places.
AKA: How Do I Get a Story of My Very Own?
The Changeling sphere is lucky enough to have a lot of player storytellers who run plots, and staff who run plots alike. You will find some of us who are active listed under the +st command, though others not listed on this command run plots regularly in-sphere as well. Plots can include everything from one-shot stories that last little more than a scene, to complicated stories that relate to the metaplot that can last weeks or even months. Plots often need to be run for important stat raises, and should be run for all characters who ICly join an entitlement, acquire hedge-beast companions or hedge-mounts, visit Goblin Markets or places outside Aleswich, create hedgespun items, or add another kith through Dual-Kith purchase or Wyrd evolution. You shouldn't feel shy to ask around, both to ask others to create story for you, or to join in plots that are ongoing! The best way to get involved is to be proactive, and many player-STs are happy to bring people in.
Some of the regular Storytellers among the Lost players can be found at Changeling STs. In addition, a number of characters are designated with roles within-freehold to assist newbies, and we have a handful of Tiered characters, all of whom try to be proactive in getting new people introduced to the sphere and RPing as a part of it.
If you would like to run a plot of your own for others, please read +news plots and follow its directions. Pitching stories to staff is easy, and rewarding, and we hope you'll consider sometime running some of your own for others in the sphere.
AKA: How Do I Craft A Custom Pledge?
Well, it turns out that someone wrote up a very nice guide to it, here: Pledge-Crafting 101