Hi and welcome to posting at "alla".
I would say your choices of trades are ok , herbs are a great gold maker as you can farm low level areas and still make decent gold .
Skinning is also good but does mean depending on your level the stacks of various leather can be low priced compared to either herbs or ore , for example stacks of light leather as has been said do sell for less than either herbs like silverleaf or copper ore will , but the one real advantage with skinning depending on what areas you are in mean you will be able to farm far more stacks and far faster than either herbs or mining so can make more profit.
I have a tip for making your auction house trips easier , get Auctioneer suite if you have not already got it and it will guide you into selling at a reasonable price it will also tell you prices as you farm and that has to be the best thing about it. It will also show you what is worth farming off of mobs , for example the various cloth types or things like spiders silk that always sell for reasonable prices.
I know you are not making great gold from skinning at low level but if you check the auction house prices for leather you will see some types sell for very high prices so as you level it is well worth keeping skinning and it is always easier to find things to skin than it is to find herbs or ore.
Edited, Jan 9th 2009 3:47am by sandralover