1)Sample product>>>To get sample product you can go with air cargo. You can use PayPal to pay for sample. For sample you should order 1-2 product not more than that.
2)To first lot >>>Initially when we start business we go for small orders of 1-2 or max 3 cartons of products. Here we use international shipping companies such as FedEx, DHL to deliver products on our doorstep. These companies bring product from China to India and also take responsibility to clear it from customs but here they will require your KYC documents. These companies will also pay customs on your behalf and when they come to deliver product to your doorstep then they will take all the customs charges from you which they have already paid on your behalf.
3)Sea cargo>>>You can go for sea cargo but you have to make sure to go with bulk quantity like 15 cartons or 150kg.