Photo Editing: Removal of Boy

I have an old photo featuring my grandma and a little boy that I'd like to have edited. I'm looking to have the boy removed from the photo entirely, leaving just a portrait of my grandmother. Additionally, I would like some enhancements to the image just clean it up , but it is important that the original background is retained this photo is from 1974 and I want it keep the authentic vintage vibe

Key requirements:
- Removal of the little boy from the photo
- Enhancing the photo to look like a portrait
- Maintaining the original background
- Adjusting the lighting/contrast
- Removing any blemishes

Ideal skills and experience:
- Proficient in photo editing software
- Previous experience with portrait editing
- Attention to detail for blemish removal
- Ability to keep the essence of the original picture while making the necessary edits