How to tan safely?

I'm mixed. If I want my skin to look somewhat even I need to either cover my entire body the whole summer or tan completely or else I get ridiculously bluny tan lines around my neck and arms. I have started tanning hard at these areas already just doing my day to day activities, how can I tan my whole body to make it look even safely? I don't know anything about tanning as I used to try hard to stay pale.
How to tan safely?
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