One of the easiest ways to keep in-touch with me real-time is via YouTube community.
Pixiv has a private message function where I can be reached. However, you need to sign up to the site to contact me.
Refer to Pixiv's help link for more details.
Only recently re-activated. I solely use this account as an alternative for BlueSky 😅. So I can be contacted there.
Note: I won't respond to any message that resembles spam. Any spam goes straight to the trash unread.