Create a New Identity: You want something to use as your sex worker personality that has no connection to your real life at all. The first thing you should do to protect your identity online is to create new usernames and accounts for everything. Your name, e-mail, Reddit, PayPal, bank accounts, Kik, Twitter, Instagram, Snapchat, etc..
Identifying Information in Photos: When creating content crop out or remove any identifying information from the background. Bag from your favorite store, state flag, college or high school logos, anything you think could lead to someone figuring out where you live. I would suggest using a plain sheet or cheap photography backdrop so you keep photos clean and still looking professional. When taking photos near windows be sure no geographically identifying landmarks, car license plates, flags, etc... are in the shot.
Remove MetaData: Some phones and cameras store geographic information with your images and videos which can be retrieved fairly easily. Uploading to websites like Imgur or I'd suggest Redgifs (users can see all your promo pics/vids when they visit your account) will remove all metadata for you. You should still be cautious and check the information saved with your files before sharing it with buyers or in any subreddit just to be sure you're keeping yourself as safe as possible.
Return Address: If you are selling physical services (bra, panties, socks, cum, pee, farts, etc...) never write your location on packages. The best option to ensure no lost packages and no funny looks at the post office is to purchase a PO Box just remember this gives you a physical address that can be located. The next best option is to write the address of a grocery store, Walmart, etc. from a city far enough away you're comfortable using it. Keep this address handy to use each time to avoid suspicion or look one up when you're at the post office just be sure to notify your buyers that you are not responsible for lost packages.
Social Media: If you don't use normal social media accounts very often delete them for your own privacy. If you use them a lot do a privacy checklist and set up the privacy so you can only be searched by phone number/email. Most of that can be found in the settings.
Use a VPN: Anytime you are communicating with someone on your phone/tablet/PC that way they cannot find your IP address which would tell them just about everything you have ever done on your device as well as your location. You should turn off location services for your smartphone, tablet, PC, and camera to avoid having that information recorded while creating/selling content or communicating with buyers as there are so many scams to steal data these days.
I like using Zenmate VPN, McAfee VPN, or Free VPN as it seems to be available on PC with software or an app available depending on what type of device you use that will cover your entire PC when you are online, a Chrome/Edge browser extension in case you only want the VPN when you are using your browser, Android, and iOS with a free version I used for several months and truly enjoyed so much that I recently upgraded to their premium VPN which allows you to delete all of your browser data when you turn off your VPN which is just another added safety net for staying safe on the internet. I would say even if Zenmate is not available in your country could still download almost any free VPN that will help protect your privacy online and if you are on public Wi-Fi using a VPN will keep your device from getting hacked which will definitely give you peace of mind. Even if you are not doing sex work it would be a wise choice as it will protect your banking information as well as any other sensitive data on your device.
2. FREE VPN