There are several reasons to do this. A smaller bed will be easier to prepare, plant, and maintain. It will also give you hands on experience in herb gardening and help you to decide whether you like it enough to expand your efforts next season. A FEW Plan to plant only three or four different herbs at first. As long as they are pleasing to you, plant them.
Most herbs like to grow in a lot of sunlight.
Sun helps herbs to produce their essential oils, which contain the aroma and active constituents. Roots that sit in chronically wet soil can develop fungal diseases that thrive in wet conditions, causing decline and probable death of your plants. You are much more likely to use them if they are close to your house. If you have limited space for growing plants, think about container gardening. Many herbs are perfect for containers.