Starting my DCA journey

Hi guys I am after the best exchange to set up my dca on!

I’m after the lowest fees and lowest spread their is, I have looked into Coinbase, kraken, strike, ( don’t wanna go binance cause I believe Cz is a fuckwit )

I will be investing around 50$ a day or $350 a week - would like to know what format I should run and why you believe that.

I am after a reasonable technical exchange as it will help me become more knowledgeable about limit orders and so on.

And any other tips you guys would like to share would be greatly appreciated!