There is many sites where you can sell nudes online (you need to be 18 years or more). Make sure you photos are attractive and high-quality as there is a lot of competition and you need to provide quality content to compete them.
You will need to join some subscription site such as OnlyFans, IsMyGirl, Frisk, MYM Fans or any other and create account. For account verification you will need your ID card (as this is required by law for all such sites).
Next step you will need to upload some photos on social media like Instagram and Twitter and use different hashtags to get your profie and photos visibility and followers (on social media and on subscription site).
If you invest decent time into making content and promotion on social media (at least 1 hour per day) you have nice chances for success and making some really good money from it.
A lot of you think about earnings – can be anything from $100 to $10 000 or more monthly, depends on how good is your content. If you are beauty girl with nice body, you have high chances for success.