Article 2 of the GDPR says: 2. This Regulation does not apply to the processing of personal data: (c) by a natural person in the course of a purely personal o

Article 2 of the GDPR says: 2. This Regulation does not apply to the processing of personal data: (c) by a natural person in the course of a purely personal or household activity. I'd say this fits your personal blog; no action is needed.