Earlier quoted context omitted.
You don't need a lawyer to send a standard "right to erasure" GDPR request and they are required to respond within 30 days: https://gdpr.eu/right-to-erasure-request-form/
Yes, but here comes the problem: where would I send this request? Instagram notes no public facing physical address for my country and their support e-mail just sends back automated replies.
"The data controller responsible for your information is Meta Platforms Ireland Limited, which you can contact online or by writing to:
Meta Platforms Ireland Ltd.
4 Grand Canal Square
Grand Canal Harbour
Dublin 2 Ireland"
The "contact online" link leads to the following form: https://help.instagram.com/contact/186020218683230
I would send the request both online and by tracked post with a proof of delivery. In the end your lawyer would do the same thing and charge for this at an hourly rate.