When you are a new freelancer there is only one question that is most relevant: How to write a good Upwork proposal? This requires practicing in writing and sending unique proposals to many job posts.
It is not okay to think that you can get immediately your first job with one type of proposal. You are a new freelancer on the market and you need to prove yourself to potential clients. You can ask someone to write the proposals for you or to copy/paste the proposals from others but in the end, it is your job to find out what are your professional skills and to put them on paper. As time goes you will eventually find out the right type of writing proposals and get the first job and later feedback. Practice makes everything easier.
In the link below you can find some useful tips and examples for writing proposals in Data Research, Copywriting, and Web Design profession: