Hi
I learned by doing 2 things
1) finding something that I would like (like a iPod for example )and start working on it for a while
My first hands on repair was a 6th gen iPod touch and it has thought me a lot through hands in repair,soldering and much more
I recommend the iPod touch (5th,6th,7th gen) as they aren’t the easiest thing to work on but not the hardest ether
2)the second way I learned was through buying job lots of fault devices and trying to make a couple good ones out if it
(Bonus tip)
(Ask lots of questions!)
If you want to repair laptops I recommend getting a pre 2013 MacBook Pro as they have a lot of things to learn from
For example
The screens are repaired in a similar way to iPads
They have lots of interchangeable components
They are inexpensive compared to the newer ones when faulty and have a nice resale value
It’s entirely up to you where to start but before you buy anything I recommend look at ifixit guide to see the difficulty of the device first and if it looks to be within your skill bracket
If you have any questions or need helping starting at all please ask
Hopefully this helps
Any questions please ask
Thanks:-)