Such artifacts as in your last screenshot in 3D viewport usually occur when your model is too big, too small, or has non-zero transforms. We have already discussed this with you. In such a case very few tools can work with the model correctly and drawing will never work because it is done through projection. You really need to ask a question more fully because from what you write. From two words and an unclear screenshot it is impossible to understand what you need. You also need to answer the questions we ask. And if you have achieved what you want, let us know in the chat. Thank you.