Congrats on both the weight loss program and getting the aviation fire lit again!
With regard to the colorblindness issue, have you tested for a Statement of Demonstrated Ability (SODA)? Forty years ago or so I had a student who could not pass the FAA color vision test. Longer story shorter, one night he went to a tower controlled field with a fed in the cockpit with him. While at the end of the runway, the tower went through a pre-planned series of light gun signals with the student calling out the colors as he saw them. Despite his issues with the standard office test, he scored perfect in the real world of official aviation colors and was granted a medical with the SODA.
FWIW-