Best place to DCA for ~$6K invested/year for initial exposure

Hey y’all I’m looking for an exchange to start DCA into crypto as I’d like to get some more exposure and learn. Probably $6k-$7k/year done weekly so $115 – $135/week. Seems like there’s tons of ways to do it but tons of different fee structures that get confusing especially when places say “0 fees” I’m wondering if they are actually 0 fees.

So basically looking for suggestions on how to best and lowest fees/spread DCA for Bitcoin, Ethereum and maybe some alt coins like Solana or others in the future.

I saw River for Bitcoin is popular for recurring buys,. Coinbase One is popular but I don’t think I’m trading enough volume for the subscription fee to be worth it. River says 0 fees, but does this include taker/maker fees?

Any suggestions are appreciated!