Beginner advice

Hey guys, complete newbie here. I’m a 20-year-old student and recently started an SIP in HDFC Nifty 50 Index Fund. I’m thinking of increasing it to around ₹10k/month, and my investment horizon is 10+ years (long-term). Now I wanted some advice from people with more experience. I’ve been seeing some gold/silver funds like SBI Gold, HDFC Silver, Bandhan etc. showing around 30–40% past returns on the apps, which looks pretty tempting. Do you guys think it’s worth trying those as well, or should I just stick with the Nifty 50 index fund for now? Any beginner advice would really help. Thanks