[retiredbiker]

You will have to use an actual OCR program to go over the images and recognise the text, then proofread it and format it using a word processor like LibreOffice Writer. Then you can add the word processor file to Calibre and convert it to an epub. Put the image you want in the word processor file as the first thing, and it will become your cover. Use proper paragraph styling and the conversion should go very well.

Luckily, you have a CBR to start with. That is just a rar file of pictures, so un-compress it and you have your pictures. Then choose your OCR program, that's a whole topic itself.

If you are on Linux you probably already have Tesseract installed, and you can find an app called OCRFeeder that will work with it to let you easily go over each picture, get the text, and copy it into your word processor. If you are on a different OS, I don't know, others can help you.

EDIT: I was typing as you found your OCR. Everything can be done online these days. Good job. Now you just need to proofread, format, add, and convert.