I can't what will look good on you over the internet, but I can give a run down of some of the basic options for business casual. I will focus on the slightly more formal end of what that will cover. This is mostly a "here are lots of pictures of things I think work in a business environment and how formal they tend to come off" rather than a how to dress fashionably or dress for any other place. This should also help introduce some vocabulary for different cuts of items.
Note: I will not discuss dresses. They can be done well in a work environment, but it is harder to know how to pull it off.
Slacks: Should generally be more neutral colors like black, grey, and brown. Khaki and white also work, but I don't like khaki personally and white is more of a statement.
This is not a complete list. I personally look good in wide leg pants as I have larger thighs.
More formal skirts tend to come in two main cuts, they usually come in the same nuetral colors as slacks. However, it is much more acceptable to wear brighter colored skirts than slacks.
Pencil (more form fitting):
A-line (makes a triangle shape):
Here is a slight variation (a bit less formal) of an a-lin
Generally A-lines look better on people with hips and/or big calves, pencil skirts on straighter shapes
The flouncy skirts are more casual, but would be acceptable at many modern workplaces
Skirts I have seen in my workplace have almost always been around knee length. The shorter skirts I have only seen at my more casual workplace and always with dark tights. I've seen longer skirts both places, but they are less common.
There is much more variation in choices here. Almost any pattern/color combination will work. Generally the more neutral and less pattern on the fabric, the more formal it will be.
Button down shirts:
Basic white (have one of these)
Formal, but with stripes
Short sleved, and more casual.
With ruffles, it has a bit of a vintage feel to it:
With ruffles, younger and more casual
With a tie at the neck
Casual tie at the neck
Generally, things with volume on the front (ruffles, ties) look good on people with less cleavage
Not button-down: Generally more casual, but in fabrics like silk or satin are considered more formal
More formal not-button downs
In satin, so you know is fancy (satin can also easily be interpreted as being more evening wear, so be sure to use more nuetral other clothes with it):
A knit fabric with ruffles on the front:
A knit fabric (so casual) but has embellishment at the top to look like a button down (so seems more formal)
Knit fabric, but reminicent of button downs:
Like a t-shirt but with buttons down the front, so is OK in more casual places
This is a cowl neck. It also adds volume, but beware of being too low cut.
This is a very boxy shape, I don't think it looks good on most people:
This has an empire waist (which means it has a band/elastic right below the boobs). This is generally recommended for people with larger boobs.
Guidelines for pairing things:
Don't have two things that have a print.
If you have two neutrals, you may want to have the blouse have some interest from the cut (like ruffles, or big kimono sleeves)
Don't add volume to both your top and bottom half (wide pants and a boxy shirt)
edit: formatting and slightly modified intro