I'm going to take a different angle in this.
First off, sobriety by itself means nothing. You're not drinking anymore? So what. Sobriety is merely a first but very crucial first step. You can't do it, you might as well give up and fade away as you'll never be able to make the next moves.
You have to have a plan. not just some thoughts but a written down, coherent plan of attack. Self transformation is the what you will be doing. Tear down and out that which hinders you so you can rebuild and reinvent yourself. Find out what would be a satisfactory state of being and figure out a step by step process of making that become your reality.
And don't say you're too old. I'm past 40 myself. Though granted, i'm not fooling myself. If my plan doesn't work out i might as well find an exit door as i will basically be waiting for the end, the sooner the better. That's the chance you have to take.
A better life is out there but getting it isn't easy. If it was, it wouldn't be worthwhile.