You'll need at least 1GB of RAM to be able to play the game with any sensible good graphics. I have 760MB and have to play on "Extreme Performance" - the lowest setting. Your video card will need at least 128MB and have the shading feature required by the minimum
specs.
I certainly know about baby-agro, I get it all the time. Not to mention wife-cat-dinner-work-store-homework-bathtime-readmeastory agro.
You will have content that the two of you can tackle. Like Dirges said, if one of of you is a healer, you'll be able to tackle even bigger fish. But you would be surprised how forgiving may people are in the group. Seems most folks get agro of some kind.
Tradeskilling can be tedious, as you will stay in a indoor crafting area and move from table to table making combines. However, it is rewarding that you can create things for yourself and even items you can sell.
You won't be making large cash at the start, that will take some time. If you choose sage and have a Mage character, you can make your own spell upgrades. If you are a Fighter and choose to be a armorer, you can make your own armor.
Player-made gear is about the best, except for some occasional very special loot drops.
If you like small guilds in a child-friendly environment with no pressure, come to Najena and look up Foundation. We are all families with kids and fully understand the meaning of, "Got to go, baby-agro!"
Look me up, I can help you get started. :)