If you are good at the STEM (science, engineering, technology, and mathematics) subjects but don’t want to do them for a living, a patent lawyer is an option. Most patent lawyers work for the government, large corporations or big firms (rather than hanging out a shingle in Boro Park). Because most people going into law lack a background in STEM subjects, it is probably a good career prospect if you want to be a lawyer. The usual caveats about lawyers having trouble finding work are less applicable if you have an unusual undergraduate background and skills that are in demand.
If you “undergraduate” is a BTL based on yeshiva credits, you are totally not in the ballpark.
Undergraduate you should get a degree heavy in STEM (exposed to all sciences, major in one, perhaps in general engineering). Take course in technical writing since writing skills are necessary. Learn enough of government/history of the United States so you don’t make a fool of yourself.
An elite school is probably the best for law school, though undergraduate is less critical as long as you have a strong STEM background.