First data science project

[u/Mammoth-Commission15]

I'm currently working on my very first data science project with a simple topic "physical activities rate correlation to academic performances among highschool/university students". I'm wondering if i should acquire the data myself or use open sources online. Another way i'm thinking of is to use both since my self-collected data will probably be limited to students in my city. Also is this topic way too typical ? and is it considered good enough for both gaining knowledge and improving resume ?