From the Rav’s Desk: Shaalos and Teshuvos on Rav Yehuda Hachassid and others

Is there a source for what I heard that one should not be the first person to live a newly built home due to danger?

Yes. So is written in the teachings of Rva Yehuda Hachassid, as discussed below in legnth.

See: https://back.shulchanaruchharav.com/halacha/building-a-house-on-new-ground-warning-of-rav-yehuda-hachassid/

May women or girls walk around without socks in the summer?

There is no leniency given in this regard in the summer versus the winter. Nevertheless, in the privacy of one’s home, when men are not present, it is permitted to walk without socks. Even so, it is a Midas Chassidus to dress modestly even within the privacy of one’s home, and doing so merits having good children who follow the path of Torah and Mitzvos.

See: https://back.shulchanaruchharav.com/women-wearing-socks-stockings/