You can only do what you can do today. You can’t do it tomorrow or yesterday, because yesterday is gone and tomorrow will be today.
We all spend so much time worrying about what we have to do. We worry about how we’ll do it, if we can do it, if we are doing the right thing, how it will work out, and so on.
All you can really do is live in the now. The now is real.
Do the best you can now; stop worrying about tomorrow and the rest will take care of itself, you’ll see.