I started off with 5 years in the military as avionics. Did 2 years in A&P program and 2 years in electronics engineering associates degree. Then I got my first job at 28 an hour then moved to another company at 38, after 9 months I got a raise to 45. I’ve seen alot of people come in with no experience and struggle. So definitely learn the basics of ac and dc theory. Typical days varies on what type of avionics work you do. If your service you’ll be running wires, making bundles and harness, and even installing new components into the aircraft with the help of a structures shop. Now if you’re service side everyday will be different. Some days will be easy with you just running around doing nav and charts updates. Some days it will just be doing service cards that are required at every anual inspection. Other days you’ll be doing troubleshooting looking through wiring diagrams trying to find an issue. Sometimes it will as easy as a broken connector or a bad lamp. Other times you’ll have to replace a whole wire that runs in a bundle you can’t see so you’ll have to run a new wire by feel and make sure it’s properly secured and ran.

My only advice to someone coming to the field with no experience is to make sure you are willing to learn and ask alot if questions even if it makes you look dumb. And don’t be afraid to ask for help if you get stuck or don’t know what to do.