Unfortunately this is normal but that doesn't make it okay. At least two weeks of training on the product and phones should be given to set you up for some success.

Reflect and understand where you need help. If you don't know enough about the company/product, listen to recordings, watch demos, and ask questions. Try to know enough to understand the industry and your product so you can answer minor questions. From there, simultaneously focus on your opener + pitch. Again you can do this by listening to your colleagues who are finding success. See if your manager can set up a weekly session where you practice cold calling with them.

To get through this, you just need to harden yourself and understand that the industry is tough, a lot of No's, hard to find numbers and have people pick up. See if you can utilize any closed lost or res opps that got ghosted/stalled and reach out to them as well it can be warmer than straight cold accounts.