Advice on buying $100k in ETH

Basically, I have $100k I want to invest into ETH within the next 4 months and want to hold for it for at least 6+ months. How would you recommend I go about this? To move that much money without problems and keep it safe.

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Background: I’m pretty new to crypto, and I’ve been following and researching crypto for the past two months. In that time, I’ve only done 1 buy and sell order. I have a good idea of how I want to do this, but I want some input from the community dropping that much money down. Thanks!