You can and should use your dissertation supervisor as a sounding board as you develop your thinking, although beware of bombarding them with enthusiastic and/or panicky emails.
It’s usually better to ask for a meeting to discuss your ideas, rather than trying to have a discussion by email.
Check the university’s requirements, and if necessary consult your supervisor about what to include.
An example ethical committee approval form may include questions such as: Will you provide written information to participants indicating the nature and purpose of the research, that their participation is voluntary, that they may withdraw at any time, and provide contact details for further information about the study?
By the time you have finished developing your research question(s), they should be tight and carefully defined, including a clear idea of the sector or area of study, study population, and what someone will know after reading your research.
Once you have a topic, and research question(s), then you can decide on a title, which should broadly cover your research question(s) and summarise what you are going to do.
As a general principle, it is better to research a narrow topic in more detail than a broad one in very little detail.
Start to write up your research proposal as you read around your subject.
Your outline methodology should explain: This section is designed to show that you know what you’re going to do, and why.
It will also serve to show whether you’re trying to do too much/too little, which your supervisor should point out to you at an early stage.