I have 2 questions about Instagram, can you help me?

These days my daughter posts most of her photographs on Instagram. I can look at them but is there a way of “following” her when I do not have a mobile. Can I follow somehow using my PC?

Next question: When looking at the photographs yesterday there were a handful I wanted to save to my computer but found no way to do it. Is it possible to save Instagram photos to one’s computer?

If you know how to do either of these things I would be delighted if you could please talk me through the process. Many thanks.