Need Clarification

[Ebony]

Getting ready to go out of the Nexus for the first time. How do I do the posts? Do I wait for someone to reply, or simply keep replying to my own posts? And when I get to an area like one of the towns, what then? Am I supposed to attempt to do 5the town's reaction to my character, or is that something a mod or someone else will do? Also for fluff encounters like meeting someone on the road, I take it that it is ok to simply play them? Little bit confused, hoping for clarification