One thing to keep in mind is that sadly we will almost always take advantage of our bodies again despite injuries or situations that teach us a lesson. It’s unfortunate but sadly part of the human condition I think lol. I will amid though that you’re likely not going to hurt your back again which is good! As long as you keep your back in good shape most of the other things should work out! 

Good luck on the visa business, I hope it gets renewed quickly but it’s also equally important to plan for the other situations as you’ve said. That also should hopefully mean you don’t get separated from your partner too since that’s always tough! I’m sure it will work out and you’ll be able to get to those things you’re wanting to do which is good!