1)
What is the meaning of "v'Es'halechah va'Rechavah"?
1.
Rashi: [I will go] in a Halachah that spread throughout Yisrael.
2.
Radak: Since You will help me to learn Torah, my steps will not be narrow in its way; I will go in a wide path.
3.
Malbim: Since I investigate the Pekudim that arouse memory of Hashem's Chesed and wonders, I will go comfortably, that He will do miracles also with me - "Ta'avti l'Fikudecha b'Tzidkasecha Chayeni" (40).
2)
What is the meaning of "Darashti"?
1.
Rashi: I requested.