I'm 16, 135 lbs, and trying to get bigger. I have whey protein should I also buy creatine, mass gainer or both?

I've been lifting for about 6 months now and I do a lot of cardio all day practicing and running, but my basketball coach said I need to get bigger. I bought Iso-100 whey protein this month. Is this enough for my age with consistent lifting and eating a lot or should I supplement with either creatine or mass gainer? And if yes, can you recommend a specific brand?

Thanks!