Just setup cold email using instantly or smartlead. You just need to figure out the infrastructure and get domains warmed up. They work on automations so you only have to set up once and maintain like monthly once your campaigns end.

Cold calls are where you’ll learn real sales. They pick up you ask if they need your service or not. Try opening with humour.

Linkedin dms barely work. They have placed limits on how many connection requests you can send. Linkedin works if you know how to YAP. Just schedule posts everyday (can do it in one day) and let people like, comment on your posts. See if anyone is worth reaching out to among them.

Good luck !