You might want to wait for someone to give you an in-depth review of your story here.
For me? I suggest you continue writing more chapters instead of asking for a review immediately.
It's kind of bland from the get-go. Don't take my words seriously, because I'm not a fan of BL works.
Go to Preferences. You'll find the option to turn on dark mode there.
To go to Preferences, you need to click on your profile once. You should find it there.