It wouldn't matter if you are a fresher or if you've had 5 years of working experience with your supervisor, getting multiple recommendations from a single person is always difficult. You'll come across too few people who got their recommendations on their first requests. With that said, I'll give you a couple of tips:
(1) Don't be too objective about getting your recommendation, try and bring some value to the table. To give an example, you can't ask a girl out by simply asking her out you have to make that right conversation and the right impression. And in both cases confidence is the key
(2) Be very clear on what you expect from them. Let them know why you selected them and which experiences you'd like them to focus on. Try bringing positivity to the conversation. Hopefully by doing this they will find the appeal in recommending you.
Writing your recommendation for your self is fine, but like already said above it may or may not work for you depending upon how the admissions committee members view it. It's best to avoid it as the risk is too high.
Posted from my mobile device