This essay seems like a practice essay for TOEFL or IETLS. It's better if you mention the purpose in the title itself so that others can provide you with more task related comments. Also, you should have opened this essay in the Writing Feedback forum.
There is an argument over whether or not getting advice from older friends is more valuable than getting advice from friends of my own age. Some believe that advice from the older is more influential and more valuable. Indeed, I agree that older friends are better at offering advice than friends of my own age.
This is a good introduction and it is even better if you opened with a hook :)
Initially, older friends can give me better advice since they have more experience than me.
This is again a very good sentence to open your body paragraph. However, the next two lines sound a repetition of this same idea. I feel it is better you straight moved to your example.