Where can I get Minecraft that's safe and free?

I'm only 13, so I don't have a credit card. My parents don't want to buy Minecraft for me so until then, I have to wait for 5 years… So where can I get it? And any other games you can suggest? I want to expand my gaming…
Added (1). Oh and it doesn't have to be related to Minecraft… I forgot to add that

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