No help. Rant

So I'm 18 & I've been wanting to sell my car and get a loan for a new car. It's something I've been looking forward to and I know it'll make me happy. But everytime I try asking my mom how I can get a loan with no credit, her answers are really short with me. She's always on her phone and I know she has other things to deal with but I think she's just being short with me because I'm trying to be independent. I feel like I'm the only one that believes in myself and I'm really trying to accomplish this goal but nothing is working.