The Rebbe advises that before committing to a shidduch, one must ensure the home will be built on Torah and mitzvot, with both partners sincerely committed to observance and Torah study. If this is assured and there is a heartfelt connection, she may proceed. He also inquires about her family background.
https://www.torahrecordings.com/rebbe/004_igros_kodesh/teves/871