The first thing I’d recommend would be to try to get higher resolution versions of the pics. The higher the res, the better, to an extent. after that it’s just a matter of how much the project means to you, because it can take a fair amount of manual work to get it “right”. If it’s a labor of love for an heirloom, you can spend a couple hours on it, if it’s quick and dirty one off, you could get it serviceable in 15 minutes. Up to you.