Guidance for improving first heart segmentation

Dear Community
This is my first attempt of heart segmentation following the tutorial (Link), I found from this community.

I would greatly appreciate any feedback for improvement. (maybe increasing the number of seeds, or using some plugins, etc.)
Thanks in advance!

I would recommend to try AI segmentation extensions that have heart segmentation models, such as TotalSegmentator and MONAIAuto3DSeg. You can also try NNInteractive interactive AI segmentation tool.

Thank you so much!
Is there a link for a tutorial to use them?

The documentation of each extension should contain a basic tutorial. Let me know if you cannot find them or have problems following them.

Thank you for your feedback.
This is a result I got, are there ways I can make it better?