If you want an easy and awesome exchange/app to DCA through, use #Strike. If you want the lowest fees possible and maximum privacy, use #bisq or in-person purchasing options. I have a referral link for strike, DM me if you want it. IIRC it means I get $5 and you get $5 once you buy your first $50 of BTC. But I would suggest strike any day, it's simply the best.