Good seed bank I have purchased from them for many years. It has been a few years sense I have purchased any seeds but when I did that is one place I used.

If you want to start in dirt you will need a few things.

Good sterile soil is best you don't want any nutrients in your soil you want to provide 100% of the nutrients your plant needs.
Next you will need to mix 50% soil and 50% Perlite and make sure it mixes through out.
You should use good nutrients General hydro or Advanced both have one-part nutrients that are easy to use.
A cheap soil moisture/Ph meter from Wal-Mart or HD is about 8 bucks and a must.

Use only RO water so there is no chlorine or other minerals in it, this will give you control over the environment.

You will also need a good light, for one or two plants you can get some CFL but HPS 400w with a Hortilux bulb is ideal. You will need to keep the temperature stable and airflow moving around your plants and a gentle breeze across your plants to strengthen the stocks.

You should get a good book I recommend a copy Jorge Cervantes book "Indoor Marijuana Horticulture the indoor Bible" you will use it as a reference for many years to come the ISBN number is 1-878823-29-9 he may have a new one out by now, Iā??m not sure.

That should get you started, there is much more you will learn along the way to your first crop but that will get you started.