Motivation ?

I'm 15 and don't really use this part of the app just the <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">period tracker</a> but iv seen this is a place for advice well this isn't really about sex or periods but me in general. I really want to get my life together and pass my gcse but I need motavation my dream job is a neonatal nurse and I know them qualifications aren't just going to come to me but I can't stick to doing well in school. Any advice would be so thankful. Thanks in advance x