you are clearly better of with a commercial license. open source software require having knowledge, there is a great documentation of salome, there are sometimes bugs? yes. also remember you are getting a software that is shared freely, with the source code, and that nothing is asked in return.
salome is quite stable since version 9, with small bugs here and there popping up. not want to learn how to code, or as you previously asked ‘why i can not do it like this if i do it like this in other software?’ you need to learn that the software does not adapt to you you adapt to the software and its own workflows.
salome has almost 25 years (from wikipedia since early 2000) it is used as pre processing for complex simulations (and with its different flavors for simulation itself FEM/FVM).
it is used (and developed) by CEA (among others) which is the Atomic Energy Commission of france, so yeah, it can perform and it is stable (even thought not perfect).
currently salome does not offer a direct ‘user direct payed’ formation (up to my knowledge) the small team is already working on improving the software, again, for free. you are asking the cat to bark and when the cat is not barking you are annoyed by it or using a flat screwdriver instead of a Philips. the things does not work that way around. I imagine (hope) that is a language barrier but or you accept and learn ‘the ways’ and workflows of a software, or you improve it and modify it for getting the things as you want or you pay someone so it is developed the way you want.
This comment is not endorsed by salome or any of their partners, i am a simple user that values what open source is and values the work put in this software.
best of lucks.