The easy way for her to post pictures for herself would be this way. Adding attachments.
When writing up her post... she will see the paperclip icon.
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Clicking that will bring up a pop up to upload the photos she wishes to use.
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Once those are uploaded, she can go back to her post write up and click the drop down arrow on the paperclip.
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The option to attach one she cilcks or ALL is now available.
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The message is ready to post.
It is also helpful to know where to go to manage or delete those attached photos.
In a user control panel, the last option on the left bar will be attachments.
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