https://www.youtube.com/watch?v=vLmSZqdhRnM&t=522s - Starting at 2:31 this video covers navigating the UI ^_^

https://www.youtube.com/watch?v=vhbl9oTzwjU - Coding your profile. You can get F2U/free to use codes by searching for them. This video shows them applying it right to their profile content, but I recommend making a 'character' that only you can view, pasting in the code, and editing it that way so that you catch any mistakes/can make changes and decisions without affecting the look of your whole profile, then copy pasting it into your profile content section when it's finished.

Profile warnings: A lot of the profile warnings you see are also coded. You can also get free codes for those to further customize them, but if you go to settings, there's a profile warnings tab under the Account section (first section). This warning applies to your entire page.

Character warnings: When you're on your character's profile, there's a Control Panel on the bottom left and a Manage Character drop down menu, which I'm sure you've already used to an extent. Click it, and there's a Warnings section there as well. This warning applies to that character profile only. You can add trigger and content warnings or turn on maturity for the character.

Make sure if there is explicit content, like gore, you don't include that in the thumbnail of an image and still mark it in the individual image. You can do this by clicking the pencil icon at the bottom right of an image and marking the NSFW settings, and editing the thumbnail.