I don't know if I'm fit enough to be a nurse because of my asd

Hello my name's Rachel I've made a few posts on here before.Long story short I want to be a pediatric nurse I have been a carer since leaving college and my dream is to be a nurse. I have just receny gone back to college to do a 6 week pre access course the course is dead easy and if I pass I can go on to access to health and apply to go to uni to do my nursing and I really thought I was readyow i'm not so sure.today I came home from work as a carer felt really tired had food and a few drinks to chill out and was watching a good film. Then my mum got up and starteled our 17 year old dog e. Joe almost got put down in march as he became very ill but luckily he pulled through since then I've grown 9her protective of him as her is a very old now and dogs don't live forever. Any becausef his old age he has lost his hearing so if you walk past he gets up and starts to go for you but stops before he bites. So when my mum walked passed he got startled and my dad went mental with him and my mum shout at my dad and my dad has a go at me I scream at him and I smacked him on his leg then ran off. I am not a violent person but my dad smacked me as a child whenever I shouted and I d know why I did it but I did.How can I be a nurse if I smack people I deal with people like that all the time most of them have dementia and they don't mean it and I'd never hurt them but why tonighand how can I be a nurse looking after sick children if I've smacked my dad