I sheltered myself and now Im not ready for the real world

Im a 23 year old female still living at home. I use my Aunts car to get to Uni. Today I tried going to school and on my way I noticed the car was making a funny noise. Only to see that the tore was punctured. I was told by people near by that it needs to be completely replaced. I should have had a spare with me but i fid jot. It was incredibly irresponsible of me to not check if the car is ok before leaving because I put kyslef and others at risk. Now I need my uncles assitance in changing it. I feel incredibly stupid for not preparing myself better and not taking care of my Aunts car well.