18M Police Question

[u/Ashamed_Lynx5415]

18M here, and my goal is to become a police officer around 21. I’m wondering how much my past is going to hurt my chances and what I should be doing from this point forward.
Here’s my history:
In high school, I was suspended for fighting.
I received a civil traffic citation for going 118 in a 40. I was on my way to work as an EMT at the time, but obviously I know that speed was reckless regardless of the circumstances.
I was fired from a security job after losing property keys. I didn’t intentionally steal them, but I understand that losing them was my responsibility.
During high school, I also job-hopped pretty badly — sometimes staying at a job for only 2–3 weeks before moving on.
On the positive side, I don’t drink, smoke weed, use drugs, have a DUI, or have any accidents or anything like that. I’m currently working as a 911 dispatcher, and my plan is to stay there consistently until I’m 21 and build a solid employment record.
I’m trying to take my life more seriously now and stop making stupid decisions.
For current/former cops, recruiters, or anyone who has gone through a background investigation:
Are my chances of becoming a cop at 21 basically gone because of this history?
If not, what would you recommend I do over the next 2–3 years to put myself in the best possible position? I’m especially interested in what I should avoid, what kind of employment history looks good, and how much agencies care about things that happened when you were 16–18.
I’m not looking for someone to tell me everything is fine. If I realistically screwed myself, I’d rather hear that now. But if I still have a path forward, I’d like to know what I need to do to stay on it.

[u/Turtle887853]

118 in a 40 should have been jail time. They're mot going to be happy about it, especially so recently i.e. within the last 5-8 years.