NISA

Asking for a friend because Im 71 and thus don't know the answer:
° 50 year old who has just divorced and given the wife/kids everything. Wife was in charge of finance so she's set up but she didn't do anything for him apart from national pension.
° after bills etc has anywhere from 5,000 to 40,000 and interested in NISA.
Is it worth it now to start ? He will retire 65 and gas very low savings due to divorce

by AmazingJapanlifer