I would guess that with a little adjustment of how you position the saw, you could find a better way to pull it. If you are still able to handle it otherwise, starting it isn't out of the question. At work, we have to teach new employees how to run a chain saw. A fair share don't have the ability to pull over our 026/260/261 size saws. With a little adjustment, they soon learn.
I've had to adapt my starting methods, too. I don't have compression releases on any of my saws, including the 066. I always start the saw with the chain brake engaged. For me, I find I am best able to pull with the saw sitting flat on the ground, with my toe on the bottom of the tank handle. Sometimes I start it with the bar resting on a log, and the trigger in my right hand. I pull with the left hand. That's a little odd feeling, but with a little practice works well. With my ported high compression 036, I don't do that, I have pulled the starter apart several times. To keep from breaking things, I start it upright, with the tank handle in my crotch. I don't get as long a pull that way. I am also 10 years younger than you, and while short, have long arms and am a bit of a bull. So what works for me may not be best for you.
Good luck, and if you enjoy wood getting, don't give it up. It seems to me loading, moving and splitting is more work than starting the saw. Worst case, you could switch to a better battery saw, no starting required. Sell the MS310, and you could probably cover much of the cost of an EGO, Husqvarna or other quality saw. I am looking at the EGO saw for in my garage, to shorten pieces that are too long for my stove. My wife purchased their string trimmer and a spare battery through work, it seems like the saw is pretty well reviewed.
