Hi Vanna,
Potted Bay Laurel (laurus nobilis) Is fairly easy to care for but they grow best in a sunny position that is sheltered from cold winds and frosts, if you're front door faces either south or west it should be suitable for it, as they can sometimes get scorched by cold winds and frost.
CARE- Pruning, remove any damaged twigs or leaves in spring and prune it to maintain the shape in summer.
Make sure the pot does not dry-out and give an occaisional feed of slow release fertiliser as recomended.
Another alternative to the bay, that I would like to recomend is a standard Holly (illex) which are less fussy about positioning and much more hardy and come in a wide range of varieties, 'golden king' or 'silver queen' are a couple of good varieties, one of each maybe ?
I always prefer to buy from a reputable garden centre or nursery that have a good stock and where you can see them growing outside in situ.
You have to remember that the price is reflected in the years of trainig that the tree has recieved for the perfect potted standard you pay for, I find this a good motivation for taking extra care of them! Good Luck Tbird+