I often had this problem too. Sometimes the PLA did not even stick to the printing plate, probably because it is not heated. I was able to solve the problem with adhesive spray, no warping, no more adhesion problems.
But it takes a moment to get the temperature and printing speed right, which in turn also depends on the material.

An active forum, as all the others have already written, certainly helps too.

Hello,
Yes, many things can go wrong.
I recommend Philipp's YouTube channel.
https://www.youtube.com/channel...
He explains in a pleasant way why and why what should be done.

I assume you have problems with warping. There is a lot of information about this on the Internet under this keyword.

e.g.
https://www.3djake.ch/de-CH...
https://all3dp.com/de...