This is the third thread you've started. The other two are on the CA state forum, so continue with just one of those to plan your general itinerary.
Start a thread on the Monterey forum that is just about tourism on the Monterey Peninsula.
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This thread should be about Yosemite as this is the Yosemite forum. (Other folks might 'lurk' on your thread to get late April ideas for their Yosemite trip.)
I'll ask again: have you looked at the Top Questions on the right?
Spend an entire day in Yosemite Valley. Share your draft itinerary with us and we'll help you refine it based on time of year, interest in just 'light hiking', one way roads, possible shuttle route, etc.
Spend a half day at Mariposa Grove of Giant Sequoias in the southern end of the Park. Or go to smaller Tuolumne Grove of Giant Sequoias on the way to the Big Oak Flat Entrance. Or exit the Park and visit Calaveras Big Trees State Park.