I would also like to recommend a playlist called "Shibari for beginner to advanced".
This is a playlist of other YouTube channels with useful tips and tricks.
If you feel ready to move on to more advanced stuff you can check out the playlist "Art of Ropes Tutorials". All knots covered can be found in the first suggested playlist.
Note: the tutorials are exclusively illustrative and do not show anything regarding safety. We therefore ask you to follow some workshops before you start tying people (or yourself) and especially before you start with suspensions!