That depends a lot on your particular location and situation. Many times, it is difficult to get hired at any police department when you do not have your state certification (varies by state, etc). Small departments are more likely to hire, but they often can't afford to send new officers to academy for state-mandated certification. Once you have that certification, your options open up more.
For those who want to get into police work quickly, some major departments will hire and train, but you'll be working in danger zones. In my day, Miami Dade country and Houston PD would send people to hiring events at local conferences and hire dozens on the spot, move them to wherever, and then grind them up. Up to you.
Law enforcement is a very weird career path. You essentially alienate yourself from friends and family, partially due to your working hours and partially due to objections to what you do for a living. You go through hours and days and weeks of complete inactivity, and then you sprint like an athlete, jump fences like an olympian, and wrestle like a, well, a wrassler. You write piles of reports, you get frustrated by dealing with the same 10% of the population who are absolute scum and can't stay out of trouble, you feel bad for all the women who are punching bags for their partners, you see the tragedy of all the drugs. You get sick a lot. You get exposed to all manner of filth, and you'll never feel like you're clean enough when you shower at the end of your shift. You'll toss the back seat of your cruiser and find guns and realize that somebody you transported that shift could have taken your life if he or she had decided to do it. You'll be hated on by citizens for doing your job and accused of not doing your job especially when you're doing exactly your job. Everyone is a TV lawyer and 'knows their rights' and will go on at great length about them. You'll probably retire on disability after destroying your knees or hips, assuming you don't end up sucking on the end of your duty weapon.
Other than that, it's a fun job.