Oklahoma is a medical marijuana state, after all, so if you have a card…
A Pot For Pot:
A Pot For Pot will sell you the nominal “pot” in their name (a fabric one, which really is better than ceramic or something else for both its light weight and drainage) along with pretty much everything else you need to get started (aside from seeds… see below), but the main value is in the guide they send you which walks you through the process of growing autoflowering (versus photoperiod, meaning it automatically starts flowering after a certain amount of time rather than needing to have flowering induced, such as with a change to a 12:12 light/dark cycle).
If you do buy one of their kits, make sure you hang on to the instructions like your life depended on it, since even the expansion kits come with instructions that tell you to refer to the original instructions you got.
They’re worth their weight in gold as a roadmap.
ILGM:
ILGM will sell you the seeds that you need to complete your kit from A Pot For Pot.
In case you’re wondering, your local dispensary might also sell clone seedlings or seeds too.
ILGM offers both photoperiod and autoflowering seeds, but I believe they’re all guaranteed to be feminized.
Spider Farmer:
A Pot For Pot will sell you a grow light, but Spider Farmer is a great option in general.
You can also get grow lights in hardware stores like Lowe’s but they’re a bit more expensive.
The SF1000D 100W light is a good one to start with if you’re working with a small closet or tent.
Happy growing!