Good for you, friend! My "return" to cycling (35 years?) was fraught with repair nervousness. After six years I marvel that I ever used my LBS for any adjustments or derailleure installation. Only bottom brackets as I lack knowledge and tools. Derailleur adjustments were a bundle of nerves at first... youtube and practice have made them routine. I patched my first tire, successfully, two weeks ago and now carry it as a spare, after a thankfully rare nail puncture.
Don't be afraid to "mess it up"... and you will be amazed how many times you succeed!
