Being heavily steered towards getting a car however I want and know that a motorcycle is best for me?

I am on a ~$4000 budget, which is perfect for a new Honda Cb300f or Cbr300r and seeing as I work a full-time minimum wage job, I just do not see a car being practical for me. Too expensive, gas, insurance, and I wouldn't even be getting a good car on my budget, I would be getting a car that has been driven to hell and looks like sh*t on my budget. I am willing to take all Motorcycle safety classes and wear all protective gear, (I have been riding bicycles heavily to and from work/school for the past 5 years of my life), but my ignorant mom still insists me getting a piece of sh*t car is better for both me and her. I want to learn, I am willing to learn however I just feel like this is best. Is that so bad? Or should I just continue on riding a bicycle well into my adult years?

Read more: Being heavily steered towards getting a car however I want and know that a motorcycle is best for me?