Canada Taxes Doordash Motor Vehicle Expenses?

Good morning all,

Happy Easter🐣 

I have a question regarding filing my tax for my door-dash:  

I worked door-dash Oct to December of 2020 (3Month)  

I made a total of 1.2K dollars

Approx. I put 1.5k KMs on my vehicle for related business  

Start of 2020 KM is 1000  

End of 2020 its 7300Therefore, driven for the year is 6300.

Expenses:  

1. My insurance premium is super high, I pay about 350 dollars a month. (If I calculate that in a year that's like 4k+)

2. Total gas is about $500 in the year but since I started my job from Oct to Dec I paid 201.12

Anyhow,

Now when I am filing my expenses do I include the full year of the expenses or how does it go?  

I am using Wealthsimple Tax and it is asking me for KMs driven for business and the total...

I am assuming they are pro-rating the expenses if I put the entire year but since I started in October 2020 how should I include my expenses for insurance & gas?   

Should I include the totals for the year or should I only include the totals between the time I was actually working?  

If there is a website on the CRA that helps with this please refer me there. I tried checking.  

Thank you in advance & have a great day!