<human>: Give me the gist of the text in a nutshell

Hello everyone. I've recently decided that I need to have a lifestlyle change. I recently graduated with a bachelors in biology and I've realized that I'm going to need to further my education. I've always been interested in dentistry but never thought I had the decication or intelligence to go through with it. I've been doing a lot of thinking recently and realized that I need to at least attempt to do this, otherwise I'm going to waste my life away doing something that I'm not passionate about. I didn't get the best grades in my undergrad so in order for me to have a chance of getting into dental school its going to take A LOT of work. 

I was wondering if there is anyone else who has undergone a life changing step simliar to this who could offer me some advice. I understand its going to be incredibly difficult but I feel like it's something I need to do. Any advice/stories/help in general would be greatly appreciated.
<bot>: I want to be a dentist but its going to take a lot of work. GIVE ME YOUR KNOWLEDGE!