You're right; this doesn't go in here, but is (unlike most questions people have tried to post there) a legitimate question for here. I'll move it.
I'll attempt an answer -- but you have to understand that my sons were successful competitive swimmers, and I have been a ARC lifeguard instructor, so my concept of what it means to teach your daughter "her strokes" may be more rigorous than yours. That said, the ONLY way I've ever seen a child learn to swim well is to get lessons somewhere till they could at least do something that resembled a freestyle stroke (crawl) and a backstroke . . . and then putting them on a summer league team for 3 consecutive summers.
Almost without exception, swimmers with no competitive experience struggled to gain the water skills necessary to become adequate lifeguards; swimmers with competitive experience almost never did.
Regarding teaching your child to swim, using online curriculum, I don't know of one. There are plenty of off-line materials you can purchase, but I'd be reluctant to recommend any, because I've been too influenced by my older son, who was a very successful and sought-after swim teacher during his college years -- his opinions about most swim teachers don't bear repeating.
I will caution that you usually can't teach, what you don't know. There's little chance your daughter's strokes will be better than yours.
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