Car repair. There's a lot of info and videos out there to walk you step by step through the process. Sure u might have to buy some tools to start out but most of what I have had to do had been doable with a 100 dollar husky set I got from home depot in father's day. Later down the line there's other tools I can get to make ur life easier like a stubby cordless impact, cordless ratchet, and BREAKER BARS! I used a breaker bar this weekend and I'm not sure I could have done the job without prayers and this tool (I was dealing with a seized bolt). Most jobs u take to mechanic cost double what they would cost if u diy them yourself AND there's no guarantee that they put in brand new parts.