@Ishita, the best quick solution is to get Direcpay, we got it as CCAvenue was not available when we started our shop. Your paper work should not take more than 7-10 days and integrating is just few clicks in the admin panel. We get the funds auto transferred within 3 days post card authorization.
As you know payment gateway is the most critical aspect as max abandons happen there, and RBI has not made our life easier by having multiple card validations and OTPs. So having the best customer experience helps.
Nice product collection, if possible resize all image to a similar height x width ratio for better layout and look.
Best of luck.