Need your help and advice

and certainly dont set fire to anything!!

basically, to post anything, you need to be a registered user (doesnt cost anything), and you probably did this part... but if you didnt that should be located toward the top left of the home page. do this first.

STEPS TO ADD YOURSELF AS A PUBLISHER, THEN ADD YOUR GAME:
across the top reading left to right on the home page:
pic of guy with glasses and chessboard -> Log in -> Blue box with various drop down items

Step 1:
go to the "Misc" drop down, and go "create: Add Publisher" so you can create your company's presence on the database.
or go:
http://www.boardgamegeek.com/item/create/boardgamepublisher
once you do this part go back to the home page.

Step 2:
again, go to "Misc." only this time go "create: add game".
or go:
http://www.boardgamegeek.com/item/create/boardgame
once you get here, you can fill out the information for your game, and under the required field of "publisher" you type the company name you gave from step 1

**
once you have submitted your game after step 2, to ensure that your game isnt ripping off anything else, or promoting anything mischievous, your game will be looked at by BGG Administrators. Here is a video tutorial
(note: layout changes to the site have taken place, so the video may look different)
http://www.screencast.com/users/skelebone/folders/Jing/media/a63ef33e-c7...
**

Step 3:
After you have cleared BGG's submission gate, its time to add pictures to things!
Your company and game each has their own page, its time to upload images to each.
the "image" area of each page (for your company and your game) will have an upload link to it. click that and upload your company logo to your publisher page, and the box cover, as well as gameplay images to your games page.
There should be tags in the upload menu that let you choose company logo or game box cover.

Thats just about it for putting yourself up there!

SELLING
BGG's marketplace is a good place, HOWEVER you really want to make sure that your company has its own web page that is set up to take orders. Selling at conventions is good because its also a form of marketing.
Since the internet is not your biggest strongpoint, i would keep this part minimal, keeping to your own site as a foundation. Go bootstrap style and get out to the people!

ADVERTISING:
Honestly this is up to you. Consider your games audience (its truthful audience...dont just tell yourself "everybody"). Remember, this part takes time if you are an independent company. call shops and ask if you can demo your game, if they agree, set a date for a demo (DONT fluxuate on it, people will know what they missed by the other "regulars" of the shop telling them about it --word of mouth)
**keep in mind, alot of "board game shops" are contracted pop-up shops that have no interest in seeing anything any of us make.

Go to conventions, first as a guest. Research while taking notes on what works or doesnt work for other independent companies. Then go again at a later date having your own booth at the next convention.
keep in mind that there is a difference between "conventions" and "trade shows", know the difference and approach them as such.

I hope this post helps.
and remember, dont burn anything! :)