I rarely use it. While I did learn proper touch typing (on an actual typewriter back in the stone age), I mostly use the left shift key even when capitalizing letters typed with my left hand. If I use right shift at all, it's only for a few awkward letters (mostly Z).
Same for me. I learned "proper" touch type but never retained it. Instead I hover type with whichever hand is convenient. Can still hit 120WPM with >90% accuracy though