First to check in your circle friends/relatives who want to buy your product i.e Loan
My background is also from engineering and from day first i am selling Raw materials, so don't think you r engineer and who has MBA degree will sold product better then you, this is shit
As you r engineering graduate, you know the companies and factories name, target their employees specially middle class, in small companies may be managers and in big companies their asst. managers and officers rank are your target
as the product is loan you have to first make relationship with people by your and your company introduction
also you can contact your seniors who is already have jobs and have experience of 2-3 years they are the right target
Social media is gr8 platform to offer your products