I poked around the website and it just looks like a bunch of basic weight machines? The kind that you can find in any gym? I don't know why you need to pay a premium for this sort of thing - you can go to any Golds Gym/Planet Fitness/LA fitness and find this stuff. I'm not 55+, but I am 51. I just started weight training 1 year ago and began with just pushing a bit of weight around on the weight machines. The first couple of times I went, I used weights that felt pretty easy for 10 reps at a time. After that, I started to slowly increase the weight up to the point that a set of 8-10 felt challenging. I've been VERY SLOWLY upping the weight and am proud to report that after nearly a year (along with a bit of increased protein in my diet), I began to see progress. I now am doing a mix of free weights, machines, curlbar, smith machine, assisted pull-ups. You don't need a specific program or a pricey trainer. If you have specific injuries or concerns, you would be better off with a few sessions with a physical therapist to work through those issues and then start lifting. Go slow, start light, and move some weights around.