Personality change. Mentally-This is going to be the hardest part of change, because when people do change their personality it's hard for them to stick to it. Don't think it's fake because you want to improve yourself. There is no harm in becoming a better person, just as long as you do the right thing.
Widows or widowers benefits based on age can start any time between age 60 and full retirement age as a survivor. If the benefits start at an earlier age, they are reduced a fraction of a percent for each month before full retirement age. If a person receives widow's or widower's benefits, and will qualify for a retirement benefit that's more than their survivors benefit, they can switch to their own retirement benefit as early as age 62 or as late as age 70.
Qualifying widows and widowers have to file when gross income tops $16,750 or $18,000 at 65. If you worked and had taxes withheld from your pay, you'll likely want to file even if you didn't make enough to make it mandatory. This is because you may be due a refund of the income taxes you've paid.