Hi,
I'm enrolling in a Bachelor of Science but I'm totally confused with unit selections

I've chosen the following units but I don't know if it fits the course map.
Units:
-BIO1011
-BIO 1022
-CHM1011
-CHM1022
-STA1010
Elective: I'm thinking of doing a more laid back unit such as academic writing, although I want to get into Medicine afterwards, is that a bad decision to do an unrelated unit?
Also, i'm confused what level 1 sequence 1 stuff means especially on the course map for sem 1 and 2 could someone explain that plz! Thanks so much!!