Easiest way to encrypt an SSD

I am security illiterate
I have about 100GB that i want to Encrypt in a way where I can access that info but only me can access it
Is an encrypted cloud copy a good solution?
And if yes how do i go about it?
Please i googled so many answers and they all talk about WDGA ESPN UTIA modes those are random letters i put but thats how it looks to me all gibberish
I am 2 years old …

access cloud copy encrypt encrypted good info privacy security solution ssd yes