Go to the Google fonts site:
Find the font that you would like to use for example indie flower:
Click on Quick use which will open the following page:
Use the link to get the download:
Use the URL to download the font:
If the text is a WOFF convert it to a TFF using everythingfonts.com:
Once converted double click on file and install.
You will now see it in your list of fonts in Photoshop.