I wrote an article on potential red flags in junior designer portfolios here: https://medium.com/design-bootcamp/5-common-red-flags-in-junior-ux-design-portfolios-b0183266887f

and a comprehensive article on breaking into design: https://medium.com/design-bootcamp/breaking-into-ux-design-the-ultimate-guide-36434a3055c4

Hope these might help on your journey 😄