Of course! Anything you post I'll give tips to, and anything we throw out I'll point out to you. There aren't a lot of do's and don'ts though. One of them is in serious RPs, don't spam your posts with tons of fonts and colors. Pretend you are writing a story, and write consistently in first person, third person, or god view. Which ever you prefer. You can change them between posts, and it's alright if you make mistakes (I will start out 3rd, and move into 1st by mistake. I'm used to writing 1st most of the time), as long as it's still readable. Also, it's not anyone's standard, but some of us have a few formats set that we use, but other's are free to change it up.
A few simple posts might go like this, try to pick out as much as you can.
Teknonick's Post
[Naoto]
I walk up to the counter, slamming my fist into it. "Waiter! Get me a couple o' your finest drinks!" I yelled out to the man behind the counter. This bar is a dump! I've got to remember not to come here ever again. ((That right there was a 'thought'. People do this differently, but Ragna and I are from an RP where we generally just use italics.)) "Waiter!" I yelled at the top of my lungs, waiting for him to return. Once he stood up again, he slid the drink down the counter. I caught it, and drank it down as quickly as I could. I tossed him a few coins, and nodded with a smile. "Thanks."
Some Admin's Post
<Naoto>:
After you toss your coins, you decide to get up and leave ((This is Powerplaying right here. It's okay by some's standards, especially since he's an admin, but we try to avoid big actions like this unless we're moving things along.)) as quickly as you came. You notice on your way out some old lady in the corner being harassed by a bunch of adventurer's with owl products, and trying to force her to work for them. Somewhere else in the room, a goblin is playing some sort of music box. After you exit the tavern, a dragon appears!
Dangit's Post
[Humble Hero]
I charge at the dragon, leaping into the air and slice at it, killing it in one blow! ((Godmodding! First: The admin didn't explain where the Dragon was. That's a problem on his part, but there should have at least been an OOC discussion about where he was to clarify. Second: Killing an NPC INSTANTLY, no. Especially since it was a Dragon! If it was a little goblin... depending on the RP... maybe. Third: This was an event given to another player specifically. If they wanted to, they should have jumped in and observedfirst. Fourth: If the admin had specifically pointed (I use <> to point, [] for 1st/3rd person) to all the players in the area, or those two player specifically, this would have been less of a problem. This post was so bad, I would instantly redact it (Tell them to remove it), and give them a HUGE warning for doing all that. If they've done it before, I would ban them at that point.))
There's a lot of things to learn, and everyone's styles are different. Completely different sometimes! I personally don't use Bold, ever. I use Italics for thoughts, or emphases on a single word (Or remove the italics, if it's a thought.) I use [] for personal character control, {} for NPC control, and <> for event controlling. You don't have to follow any of that, it's just what I go by. It also helps to add the [] so other's know who you are if you never mention your character's name in a post, or if you post with multiple characters, and want to specify who you're RPing as at the time, or from who's perspective (If you want a specific one, as opposed to the group's perspective.) It's also important to make sure you specify actual actions, versus thoughts. If your character says something, it should be obvious who heard him. If he wants to hit something, it should be obvious whether he wantsto hit something, if he's goingto hit something, or if he didhit something.
Another good thing, is responding to a whole post! If someone (Such as an event admin) posts something, you don't have to respond to just what they said, or the very end of the post. It's also nice (But hard to do, even for expert players) to make your ENTIRE POST filled with options for other players. It's nice when you post something so big, that it's fun to read, but also gives other player's reasons to post and respond to it. I used to RP with this one guy, and we ended up being the only ones in the RP... but we ended up with massive posts, and responding to the entire post every time. We gave options like "Ready to smash the other one's head in!" and "Was about to say 'Blah blah blah'", which let's the other player decide whether or not your character had the chance to actually do those actions, or get interrupted. Things like that made it waaay more fun to RP, as we were always going back and forth, and it worked out more realistically! Instead of one character speaking, then standing still as the other's responded in their turn.
Anyway, that's my tips! I'll throw you better one's once we start, since I'll be able to point things out better once I understand how you post and the such.