Since you have it already as an image, download one of the free image processing program that has OCR.
I know because, I use it constantly for what you want to do, that the Free Irfanview with the OCR plugin can change the text in most images into copyable text. With a program like Irfanview with OCR, you can copy the text from any image whether you scan it or copy it from you computer screen. I have OCR'ed with Irfanview, many paragraphs of text.
As other has said usually there is minimal variable text in a funeral card so could quickly be typed in. If you are using the funeral card as an example get Irfanview or or similar image processor.