@Sudipto I sent mine back to Vodafone because I couldnt get on with it. Mine came with a keyboard and the SPen. For TABLET you just cant beat the Ipad Pro 12.9 Inch
Hi there & welcome :-).
You say that you're having problems with the stock Samsung keyboard.
Have you tried "Swiftkey" which is available in the Play store?
It's a great keyboard for swiping...probably the best. (Plus you can change up the look of it with different themes too).