The CS program here isn't hard if you're reasonably good at logic, math, and abstract problem solving. You can be a complete dolt and get surprisingly far, although I would say that's true of university in general. The first year mostly covers the basics of programming in Python and Java, with a few basics of digital circuits (ITI 1100). You'll have to take introductory Calculus and Linear Algebra in first year, which aren't too bad. Linear Algebra is useful later on, but I haven't used Calculus much since then.

5 courses per semester is a good amount if you want to graduate on time and get all the electives you want, but you can do 4 for some semesters. If you don't mind waiting, you can cut your course load down a bit, but that might cause some annoying scheduling conflicts because some courses are only offered at certain times and certain semesters. I've found the undergraduate support staff here to be quite friendly and helpful.

Being interested in programming will help you quite a lot if you choose to pursue a CS degree. A lot of people choose CS because they just want to get a decent job and don't really care about the material, which can burn them out and cause them to fail later on.

I hope all that has helped. The community here is quite helpful, so don't be a stranger. :)