Here are some various ways you can get your character involved into the story. There are other ways but these are some good ways for all the people who dont want to take the time to try and figure out a way by themselves.

-Directly join in Story
-Start own Story
-Get Introduced into a Story


Directly join in Story
This is probaly the most used way of getting involved into a story. This is where you would just join in without nobody being aware of it.
Ex.
(Previous post) Kills 4 stormtroopers.
(You posting) Runs out of the woods and kills 6 stormtroopers.

Start own Story
This is where you would go to a planet and make a new thread and post a message.
Ex. Slay sits down at the table fixing a droid and waiting for a customer to come and purchase a item.

Get Introduced into a Story
This is where somebody introduces you into the story.
Pretend that Memo is you
Ex. "I have recruited somebody to come and help on this mission, his name is Memo and will be here shortly." Slay told the commander.

Then you can post sometimes afterward saying that you come and then your introduced into the story.