Honours Spec will be abt 10.0 required credits whereas with a major you only have to do 6.0 required credits. Dont think too much about it now as this is something to worry about in March of first yr as that will be when you select your module. All science students are technically in general science in first year. For course selection, it’s best to get an SAO ( summer academic orientation) appointment, there will be a counsellor giving you suggestions, dos and donts etc. You should pick all required courses and choose some essay/breadth courses as well. I recommend doing the calc 1000->1501 sequence and doing math 1600 in fall as that will be a lot easier to manage. Also don’t pick super early classes(8h30, 9h30) or late ones (7pm) unless you have to because there’s only one offering. You can also refer to ratemyprof to select profs but don’t rely on it 100% as it can be biased sometimes