If you can afford it - deffo. Recommended start time - minimum three months after losing your partner. It was - and still is - the only safe space in which I can be me without any consequence to anyone else.
One site to look through potential counsellors ...
This was invaluable for me - one contact with the "government" bits and it was shared across all the government bits. All that "sadmin" and repetition of my personal horror - all done only once rather than many times.
https://www.gov.uk/after-a-death/organisations-you-need-to-contact-and-tell-us-once