Forgot password: on the login page, click Forgot password? and then Send Reset Link. The link is valid for 1 hour, and you'll get a confirmation email once the password is changed. Resetting your password signs the account out on every device, so sign in again afterwards.
Verification emails: you can resend one from Account Settings with Resend verification email. Verification doesn't limit normal use, but you do need a verified email before buying a plan or entering an event.
If nothing arrives, check spam first. Accounts created with iRacing have no email until you add one, so they sign in with iRacing instead. Still stuck? Ask in Discord.