Novice has bitaddress.org-generated pockets with .08 BTC in it… how can I flip that into actual cash?

I’ve the pockets ID and the personal key. My pockets comprises a fraction of 1 bitcoin from a single transaction in 2014.
I made an account at blockchain.com, however I am unable to import my pockets into that account. (“Invalid Pockets ID”)
If I wished to promote, for instance, what would I must do?