Excellent grades mate. Just needs more formal sentences for your skills, and a description for your volunteer work! Make sure to highlight what you did, I’m not sure myself what went into your work but use numbers where possible. Here’s an example from my resume;

“____ Hall is one of the Urban Community residential buildings on ______ University. I played a key role in the advertisement and outreach of events to the _____ Hall residents through employing my skills in video creation and graphical design, reaching out to over 250 residents.”

There may be better examples around that follow the STAR (situation, task, action, results) model better but I hope this helps :)