Don't get discouraged. There is a lot to learn & we all made mistakes along the way.
If buying auto seeds is your worse mistake you are doing pretty well!
Sounds like you have not bought your equipment yet.
You should review the 'grow room design' forum for some input.
I am not sold on an 'LCD' ballast w/remote control. I would recommend a Lumatek.
Sound like your tent choice is 4'9" high by 4'9" wide by 6'7" tall. 1000W/334 cfm sounds OK. I would confirm the size of your fan, maybe consider the next size up w/controller.
With a tent this size, you can grow any plant you want. You will have to do some training (LST, topping, etc.) for some plants.
I would still grow the autos. You paid the money, you are going to use them eventually. First grows are usually a little rough anyways.
Next batch of seeds, I would recommend fem/reg strains. Northern Light would be a good choice. Google for other 'first grow seeds' choices.
You wil need some nutrients. I use Fox Farms (easy, but $$$); I am looking at Dyna-Gro for future grows.