If I want to invest $52, I would convert $1 to BTC every week for one year starting today.
Why only $1 you would convert to bitcoin every week? Small investment leads to small gain and that's all what you got. It's better if you can add some more as what you need to do is just buy and do nothing at all but to keep on holding those bitcoins that you bought.
That's just a reference number. It can be $1, $1k, $10k, or so on.
Also, purchasing btc every week if you are not comfortable moving, say all your savings, to btc all at once now.