I don't wnat to take your time and write a poem, so just in few concrete words.
I am new here as well as I am beginner and never dealt with programming neither electonical systems (thats really sad for me) however I was always impressed by "home inventors"

The fait of my career directed me into production engineering and mechanics. I hope it is not too late for me for electronic and programming basic knowledge (at least on the beginning).

Could anybody guide me and indicate how to start from what point for crazyflie programming and systems expansion in a most effective way? I mean what programming language to learn and any recommended materials the same for electronic systems? At the end I would like to understand electornic schemes of crazyflie in a way to make own exepriments and aid it but pogramming ( I think necessary for any HW upgrade, expansion). I am aware there are some programming languages which could be utilized in crazyflie but which one could be the most universal and effective.
What you suggest how to start and what learning materials do you advice?
What I am interested with for my craziflies is:
- enhance flight time by solar panels
- programmed move (altitude, direction, distance, turns)
- distance sensors aplication
- gps
- voice activation
I am aware that new sensors need new code.
I didn't make it in few concrete words

Thanks for any help and guidance.
Seba