Welcome to the club no one volunteered for!
There isn't a lot you can do to worsen or better the condition of PLS itself. It is possible that losing weight is bad (it correlates poorly for PALS, but hasn't actually been studied in PLSers), but other than possibly that not much will affect it one way or another. This is good news, in a way, because it makes you a lot freer than many people with chronic medical conditions. We don't need to take a pile of meds or avoid a laundry list of things.
So at that point it is just a game of living your life as best you can and doing the things you want to do, and that comes down to willingness to experiment, getting helpful equipment, and teaching your friends/family how things are going to work. Because PLS progresses, what works this week won't necessarily work six months from now, so it's a moving target. Don't be afraid to get equipment that is a little cooler than what you need now, because you want to have it when you need it, not months after you need it and the insurance has finally caught up. Those months aren't something you want to waste waiting. And having equipment doesn't mean you need to use it all the time, just when you need it to empower you to do something.
The great thing is that we live in the era of the internet, so as you pass through different levels of disability you will find advice and videos from other people with disabilities on how to do just about anything with whatever ability you have. So if you come to a point where you are wondering, "hmm, how do quads put on socks?" you are just a youtube search away from videos of many different approaches to the problem, and you can pick the techniques that work best for you. People with static spinal cord injuries will blow you away with what they can accomplish, what you can, if you take the time to gain their level of skill.
You sound pretty positive, that'll be a big help.
