Seriously, just DCA.

Don't play with leverage, don't try to strategically time the market.

By far the least stressful, simplest, and proven successful method is just autobuy every hour/day/week/month whatever you can afford and just leave all this stuff behind you.

Both River and Strike (if there are more please add in comments) dont charge fees after the first week of DCAing. Make your life easier, set and forget it minus periodic transfer to cold storage.