Signing up for a Developer org
Before you can practise anything, you need an environment. A Developer Edition org is a free, full-featured Salesforce instance with small data and user limits. It never expires, it is completely isolated from any real company data, and it is the ideal place to break things safely. Every hands-on exercise in this roadmap assumes you have one.
To create it, go to developer.salesforce.com/signup and fill in the form. The trickiest field is Username: it looks like an email address but does not need to be a real inbox — for example you@adminroadmap.dev. It must be globally unique across all of Salesforce and it is permanent, so pick something you will remember. Use a real email for the Email field, because that is where your verification link goes.
After you submit, check your inbox, click the verification link, and set a password plus a security question. Within a minute you land in a fresh Lightning Experience org that is entirely yours. Log in afterwards at login.salesforce.com using that permanent username.
A few habits to form immediately. Store the username and password in a password manager — because the username can never change, losing it means starting over. Log in every few weeks; orgs that sit completely idle for a long time can be deactivated. And remember the whole point: this org exists to be experimented with. Create junk records, build test automation, and delete it all again without a second thought.
If you later want a more realistic environment with sample data, you can also spin up a Trailhead Playground from Trailhead, but the Developer org you just made is all you need to follow along. With your org ready, the next lesson gives you a guided tour of the interface.
