Sounds like you're on the right track, cpongrats and don't hesitate to come back and ask more Q's!!!
Pic posting 101:
Since your posting here on KS, you already have a pic hosting account. At the top of the page there is a "Photos" tab, click on that. Then login with your KS info if not already logged in.
Once logged in you can click on "upload Photos"
If you have multiple photos to load, there is a click here tab which will allow you to load up to 6 photos at once.
Before you can upload any pics, there is a size limitation in KS so you will have to make sure they are small enough. Basic limit is 1200 x 1028 pixels. One quick way to resize is to open the pic with Microsoft photo editor. Right click on file then click open with then Microsoft photo editor (also could be your default for open) Once open, I simply set view at 100%. Then click on image-resize. Then play with the buttons in that window until the pic fits in your full screen. Also if you want, before sizing down, you can play with the image-crop function to chop off unwanted portions.
Once you have your pics uploaded, there are two simple ways to display them in a post. There is a section below the text where you can select up to three pics for showing (not my favorite) OR, you can put them directly in your text by putting imaging tags around the pic URL.
For each pic you upload, go to photos, your photos, open the pic. Depending on size, there may also be a view larger image button. Once you have the pic on screen, right click on pic then properties. Copy the Address (URL) into any spreadsheet or word processing document you use.
Example: http://gallery.pethobbyist.com/data/773562006_05_13_Savannah_evening.JPG.jpg
Add imaging tags in front and behind that url (shown in example with spaces added so it won't actually work:
[i mg]http://gallery.pethobbyist.com/data/773562006_05_13_Savannah_evening.JPG.jpg[/i mg]
And one more time without the spaces and voila, pic in your post:

You can put as many of these tagged URL addresses as you want, I've literally put over a hundred in one post before talk about dial up death 
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Thanks,
Dave Colling

www.rainbows-r-us-reptiles.com
0.1 Wife (WC and still very fiesty)
0.2 kids (CBB, a big part of our selective breeding program)
LOL, to many snakes to list, last count:
20.28 BRB
16.18 BCI
And those are only the breeders 
lots.lots.lots feeder mice and rats 