The Theme you select for your Portfolio contains all the fonts you need. Unfortunately, Adobe Portfolio only supports fonts that have been licensed for use on the web (very important).
If you really require a specialty font that's not available, use an image instead (your logo, your brand, your product label, etc...). For the rest of your text, use one of the standard or custom fonts available with your Portfolio Theme. Portfolio has 12 themes to choose from.
Themes: https://portfolio.adobe.com/themes
Theme Comparison: https://help.myportfolio.com/hc/articles/360035496294-Comparing-themes
Hope that helps.
[Moderator moved from Adobe Fonts to Creative Cloud Services.]
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