The best way to ask for help is to be specific about what you need assistance with and provide any relevant background information. This will make it easier for others to understand your problem and provide a helpful solution.
One way to phrase your request without sounding demanding is to use polite language and express your appreciation for the help. For example, you could say "Could you please help me with this? I would really appreciate it."
It is appropriate to ask for help from someone you don't know, but it is important to be respectful of their time and boundaries. You can introduce yourself and explain why you are reaching out to them for help.
To make your request for help clear and easy to understand, try breaking down your problem into smaller, specific questions. You can also provide screenshots or examples to help others better understand your issue.
If you still need help after someone has already assisted you, you can politely ask for more clarification or further assistance. You can also try researching your problem online or reaching out to a different source for help.