Your organisation's hub has its own address, in the form your-company.learninghubz.com. If you are not sure what it is, ask whoever manages training — or look for the invitation you received by email.
Open the hub address in your browser.
Enter your work email and your password.
Click Sign in.
If you have forgotten your password, use the forgotten-password link and follow the instructions sent to your email.
If you do not have an account yet, use the sign-up link. Access depends on your organisation having authorised your email address.