For an example:
To be an electrician, you need good basic arithmetic.
To be an electronic technician, you must be able to grasp logarithms and basic calculus.
To be an electrical/electronic engineer, you must (eventually) be able to do 3-dimensional calculus and quite a lot more.
To go anywhere with computers, you need Boolean logic and binary mathematics.
But as the man says, all the things you need will be taught on the course you do, but you might like to look at them first.
(But ... at a first glance, they will seem incredibly complicated to anyone except an innate genius.)
I was applying for an electronics course, and I knew my mental arithmetic was bad. So I got a kid's book of mental arithmetic exercises, and practised a few hours over a couple of weeks. I then completed (and passed) the 10 minute mental arithmetic test in 7 minutes.
If your math really sucks, but you still want to be an engineer, don't give up. Take extra math courses until you're good enough, then go for it.
And do electronics as a hobby, starting with kits, and reading up a bit at a time..
General rule: if you are a determined tryer, you will get there. If you're a quitter, you won't.