I have started maintaining my laptop by my own now. The image you see is after I am finished applying thermal paste on CPU and GPU. Cleaning has also been done.
I have decided to do all of this on my own rather than taking it to a shop where they charge for a simple task as inserting a RAM stick in a slot, for which, on my laptop, I don't even need to open the backcover. Not to forget the overpriced RAM sticks they try to sell.
Just watch some YT videos very carefully. And with the right equipment, you are good to go.
Although I definitely would not recommend it if it is something really complex.
But why pay someone without even trying yourself, right? And that too in this time when you can search the parts online and order them conveniently.