1. resize all the original images to max 600x400 for a small size of the final gif
  2. rename them in the order you want
  3. use https://ezgif.com/jpg-to-gif for free and follow the settings you want
  4. save the gif at a lower res and max compression to save in file size.
have had issues in the past with ezgif but I shall keep this in mind
reply
there are other tools to convert jpg to gif out there. Don't bother to look for "the best one". There's no such thing.
reply