Dear Tony,
Focus on moving ahead in one small step. Don't think any further than that step.
Try not to think about failure, either.
In my experience, very few efforts completely fail. If you try, you will often go forward, even if it is not as far as you would like. You might stumble a little but still end up ahead. Or sometimes when I tried I improved but not in the area I had hoped. That can be very annoying, especially if I needed to change certain things, but it is still an improvement.
If you try and are overwhelmed, stop. Most likely you tried to do too much. I say again and again to go in small steps, but figuring out the details of that can be very challenging. If you start to relapse back off. Later on, try to figure out what went wrong. Maybe you need to go a little slower. Also, if your outside life is stressful you might need to stop trying to change yourself. Often, it is overwhelming to deal with internal change as you are dealing with external stress. You just need to cope as best as you can until your life settles down more.
But even if you do fail, you will still learn about yourself and what you can and can not do. That is an improvement in itself.
