How can i fix these errors?

[Skrap98]

Hello everyone, i got an issue with automatic weights. And i got this response from Erick. Can you guys tell me what to do to fix the error he pointed out? If anyone want i can send them the blend file so they can figure out the issue. I am asking because i am completely new on blender and i would like a helping hand from the community. I just want to know what i did wrong and how can i fix it so i wont redo it in future models. You can see the topic Erick responded to here:
*Bone Heat Weighting: failed to find solution for one or more bones - #8 by Skrap98

@erickBlender

• The mesh is too heavy, leave heavy lifting to the modifiers.
• Always apply rotation, location and scale to your mesh and armature before parenting.
• Make sure, before parenting all you meshes origins are in the same place.
• Name your bones properly, this help when debugging your armature.
• Get yourself familiar with the feature under w keys in bones edit mode

[erickBlender]

let me a video to show you what i mean

[erickBlender]

Here is a video with a solution for your problem https://youtu.be/bHLbVdYgjIg

[Skrap98]

Goddamn you actually made a video for that. Thank you so much Erick! I think i couldnt get a better response than that!