Everything else the same, it is easier to switch majors to/from engineering at universities where engineering is not an entirely separate college. Most schools, one applies directly to engineering and then must apply again to switch colleges. But for some universities, there is no application to a specific major/college, just a general application. One example is Brown University (not the greatest example because admission percentage is so low) - at Brown, there is no application directly to engineering and in fact, students are encouraged to explore in the first year or two before declaring the engineering concentration. I’m sure there are lots of other gems out there like Brown that encouraging this searching. Ooh - one suggestion - Washington and Lee University (although the deadline for the big scholarship has passed).
In general - no need to pick a major now. Better to pick a list of schools for which changing majors is relatively easy.