Discretion is not the same as secrecy. It means you decide who knows about your private life, and you choose how much of yourself appears online. Plenty of people want to meet someone without their coworkers, family or neighbours finding out, and there are straightforward habits that make that realistic.
Use a first name or nickname, leave out your surname, workplace and street, and avoid photos that show recognisable landmarks or identifiable tattoos if that worries you. Use an email address you do not use for work or banking. A free address set up just for this keeps everything separate.
You do not have to share your phone number to chat. Keep messages on the site until you are comfortable moving elsewhere.
Pick a place that is out of your usual routine and agree on how you will recognise each other. Keep your phone notifications quiet if you share a screen or a home with someone. Respect the other person's privacy too: do not take photos of them or mention them to mutual contacts.
When you create a profile you receive private edit and delete links by email. Keep that email safe and use the delete link if you decide you want your profile removed.
Other people contact you through the site's message form. Check your profile settings to see exactly what is displayed.
It is optional. A profile without a photo can still get replies if the text is clear and specific.
Use the private delete link in the email you received when you created your profile.