At first, I want to give you the link to the best tutorial-series about brush-making in Krita I know:
https://www.youtube.com/playlist?list=PLNjBqr_ciXycZ5DgqJEn7g6K_cBKDg4Vw
There you will find answers to most of the questions one can have making brushes using Krita.
Now to your question:
You assign Brush-Tips to Brush-Presets in Krita’s Brush Editor, that is found via F5 or its toolbar-button in Krita.
You can select an existing Preset or you create a preset from scratch in the Brush Editor, and to that Preset you can assign “Auto”, “Predefined” or “Text” Brush-Tips.
There are two places where you can assign Brush-Tips, the main Brush-Tip is the one in the top row, first you select it, and then you can assign a Brush-Tip from the 3 categories “Auto”, “Predefined” or “Text” on the right side to that Preset, the second Brush-Tip is the “Masked Brush-Tip” in the green rectangle below the red one, also to this Brush-Tip you can assign “Auto”, “Predefined” or “Text” tips.
In the red rectangle, you could assign “Patterns” to your Brush for other effects. Both, the “Masked Brush-Tip” and the “Patterns” you can assign belong to the Painting Mode category.
To create a new Brush-Preset from scratch, you have to select one of the Brush-Engines to use in the light pink rectangle on the bottom left by clicking on the +-sign, the light blue rectangle above can be used to select existing Brush-Presets belonging to one of Krita’s Brush-Engines.
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Not really. The problem may be that a user has intentionally disabled or deleted the original Krita resources. The reasons for this can be varied, and they are usually valid if it wasn’t an accident. If you search the forum, you will find plenty of reasons why a user would not want to use them.
And if such a user is using a bundle like yours that relies on resources that are not present in their installation of Krita, the bundle will not work. There are several topics in this forum where users have this exact problem.
You can only save your bundle from such failures if you add all used resources to your bundle. Even though most installations of Krita will have no problems with your bundle, a few will have problems because of this.
If you have further questions, I’ll be happy to answer them, but now I have to sleep. I will check tomorrow if you have further questions. And in case you have much free time, wath the videos from above! ↑
Michelist