There is no electronics AFSC in the Air Force.
But there is an electronics course, that alot of AFSC's must take.
The full course is 13 weeks long.
Yes it is hard.
Yes you will have to study your butt off.
I averaged studying 3 hours EVERY night while in the school.
You take class's in Blocks
IE: one Block maybe AC circuits and last 1.5 weeks, then you are tested over that block.
There is plenty of support, from the instructors and airmen in class's ahead of you.
Some instructors even come in at night for a couple hours to tutor people.
If you fail a block, you are given a chance to repeat it again.
20% of my class failed out of Tech School and another 20% had to repeat a block.
But if you put the work in, you will pass.
The ones who failed, always seemed to be the people, who did not study with everyone else in the study room. They tried to do it all by themselves. Instead of asking people for help.
My class grades improved every single week I was in the school.
So I wouldn't worry about it, just put the time and effort in to doing the homework and solving problems and you will pass.
But that means studying and not partying with your friends.