If I try, I have a chance. If I don’t try, I have no chance. There is no harm in trying and failing. At least you’re still setting yourself up to possibly succeed. But if you don’t try for fear of failing, you guarantee that you will not achieve your goal.
Be ok with taking chances and always strive to do your best. You should give your greatest effort in everything you do. If you are taking the time to do something, you might as well do it properly. Not only that, but how you do anything is how you do everything. Don’t fall into the habit of going through the motions and not giving it your all, otherwise that will become your new norm.
If you take chances and give 100% of your effort, you can rest easy at night. You can go to bed knowing that you gave it your all and not have any regrets. Again, the only you can control is your effort. If things don’t work out as planned, let it be because of forces outside of your control, not because you didn’t do something.