Hello, welcome back.
I'll start off with the newbie tips.
First, know that this site puts more emphasis on brutal honesty than sugar coating. If you ever publish a storygame (as long as we can see you put effort into it instead of mashing keys), we'll give a ton of help, but we'd also tell you it sucked if it actually did suck. We do honestly want everyone to improve in their writing skills. Hurray!
Second, don't be dumb. For some reason, that's really hard for newbies to understand.
link Here's an example of a dumb newb.
Third, rate and comment on storygames, especially the newly published ones (like my stuff). That kind of stuff helps to boost your reputation and such.
As for stories to read, there's a bunch. What kind are you looking for? Romance? Dark Fantasy? Sci-Fi? Often, the featured ones in the categories are all very good.
Lastly, you'd want to get a profile pic. Mt Stuff -> Pictures -> Upload New Picture (you'll have to upload from images saved to your computer, btw) -> My Stuff -> Profile (where you can chose from all of your uploaded pictures in the drop down bar under Avatar Photo and click Update My Account and Profile after that).
Oh, you can't post from mobile either. You'd have to change the webpage to Request Desktop Site (or something akin to that) in your settings.
Have a nice day/night/time!
EDIT: dang, it looks like Scoople already posted direction for the profile pic. Oh well, I'll leave mine up anyway.