My sister (mid-24s/F) has never dated, left her job for a master's, and seems dull/off lately. How do I help find her a match?

so my sister’s always been the super studiy type. like never dated ever. just work work work n studies. she recently quit her job to focus on her masters full time.

lately she seems a little off. idk how to explain it. just like dull? little joyless. little withdrawn. she says shes fine but i think shes lonely or burnt out or both.

she’s never been on dating apps or anything. barely goes out. i dont wanna be that annoying sibling but i feel like if she had someone it might help her get out of this funk??

has anyone helped find a match for a sibling like this? how do i even start without her getting mad at me. any advice appreciated.