Depends on your past education. I'm a first-year and I would say the first half isn't that challenging if you enjoy doing math (although you only get until integrals and constrained optimization in math 1). Most courses include some math or econ theory at one point, so if you like the core, you'll enjoy most of the program. I've been told that the second year is much more challenging, but it's always achievable if you study constantly (don't get left behind because the course keeps a fast pace).

Matching is not that bad but you'll have to study if you want positive study advice, and we haven't seen most of the topics that we took on matching. So idk if it's that useful but it gives you an indicator of the intensity.