You can start your business from the garage, but the location of a retail shop is crucial for success. If you are close to a market or a busy area, the chances of customers (school children /parents) visiting your shop will increase.
Select the items for your shop carefully, after gathering information about the expected profile of customers (of stationery items) in your area. You can start the business after gathering the required license, permit, registration.
Remember to follow your shop timings strictly from day one – it will build up the reliability of your shop.
You can begin in a small way with your funds, and expand your item range gradually.