Definitely try BCIT, it is a lot more competitive. The competitive advantages are: People with degrees, people with experience in the medical field (volunteer or work), people with high GPA. A combination of experience + GPA greatly increases your chances getting into BCIT. Because BCIT is a condensed program, they do consider applicants with degrees first. Their admissions officers respond within 48 hours, so I would message one of them for more information. Their pre-reqs a little different, I believe they require chemistry 11. It's been a while since i've taken a look at the BCIT nursing page.
Langara nursing is also a really good choice for you. They have very similar pre-reqs to Douglas, and they consider GPA first. In my research, someone with your GPA has a higher chance of getting into Langara than BCIT. Solely because BCIT considers so many other things.
Kwantlen is also a good school to look into. However, I don't know enough about that program to comment on it.
If at any point you would like more information on any of these programs let me know! I have friends in all 3 programs and I can give you more information on the process and the wait times.
Getting into nursing is the hardest part, but you seem very passionate and determined. Just don't lose the motivation a long the way. I have been rejected many times and spent a lot of money on the application fees. None of this stopped me from applying every time the application opened. This year my calendar was filled with just application dates at different schools