Let’s try to understand this in two parts:
The only motive behind professionals stepping into the DevNet field is Network Automation. They understand how networking is changing now and want to take the lead in this transformation by upgrading their skills to planning, configuring, implementing, and maintaining cutting-edge technologies.
Passing any certification exam becomes easier when you have best prepared for the test. And, the best preparation comes out of best planning.
Since you are looking for DevNet certification training, I hope you already have working experience as Network Engineer or Desktop engineer. Because candidates taking CCNA DevNet training are supposed to have foundational networking skills, basic programming skills, and a few years of experience as recommended by Cisco as well as desired by companies as well.