I'm presuming that there are no lingering effects of this injury, correct? No significantly limited range of motion, no drastic strength loss, etc. You're 100% good to go and there's nothing you physically can't do, right?
It's awesome that you've decided to get back on track. Step one, though, is to decide concrete goals. "Getting fit" is so vague that there's no way to properly plan for it and there's no way to know when we've reached it.
Do you want to get back into recreational soccer? Is there a marathon you want to run? Do you want to get a six pack? Feel like benching 300 pounds? Basic goal setting is S.M.A.R.T. - Specific, Measurable, Attainable, Realistic, and Time-based. Matt Kroc just had a great article on this a few days ago:
Once we get those in place, the training and nutrition (which shouldn't be overlooked) will be easier to fall in line.
That's a super basic plan, it's something, but it can definitely be improved. Do you only have three days to get to the gym or could you go more a little more often?
Quick ways that I'd tweak your current plan, if we were stuck to only this:
Upper body day could be a little more streamlined. There are three shoulder exercises and one lift for each other bodypart. Yes, the shoulders have three heads, but your time and energy would be better spent doing some kind of chin-up/pull-up or pulldown instead of shoulder isolation work.
Lower body day, I love that you've got lunges. They're a really unappreciated exercise. You may want something direct for hamstrings and calves, if you have the equipment available.
And if you're hitting core multiple time per week, I like to either use the same set and reps with different exercises each day or vice versa. For example, the sets/reps could stay the same all week but one day could be plank/side plank, next day jacknife/reverse crunch, next day Palloff press or weighted crunches. Just a bit more variety.