Your overarching goal is really important. You really want to keep your goal in mind while you work, since that will help keep you motivated. You also want to include a schedule and the exercises you're going to do.
Taxes aren't generally used in a proof of funds letter. Your bank may request a copy of your tax returns when you're trying to get a mortgage or a loan,...
Think of all the important categories in your life (health, relationships, career, spirituality, etc). Give yourself a score from 1-10 on the question: how fulfilled are you in this area...
You'll want to start slowly and work your way up as you build your endurance. Find a pace or weight that's comfortable for you to do and try increasing it...
