Newbie Question

I am quickly learning but have a few questions. I am DCA weekly into BTC, smaller amounts usually $10 here $20 there. I’ve checked many popular sites and the fees seem excessive for the small amounts I’m buying. Would my best bet be to continue to DCA and use Robinhood until their wallet is fully operational and then transfer to cold/paper wallet? I know Robinhood is garbage and not my keys not my money so I’m open to all pointers and recommendations.