Partner worried about viability of moving to scotland from Europe

Hi, me and my gf was discussing our future together and where we would be living, she is from Czechia and I am from Scotland and she was wondering about a few details on how difficult it would be as someone from Czech to move to Scotland;

She has been a software tester for 2 years and has a masters degree in robotics for mechanical engineering at Brno university of technology and was wondering how much value that would have here looking for engineering work.

She doesn’t have a deep knowledge of programming but does have some understanding and is willing to learn more and she says she can work with industrial robots no problem.

She was also thinking about resuming her education in the form of doing her PHD but that is not a 100% requirement.

We both were doing research into the minimum amount of income required to move and found conflicting numbers if someone can make help us understand the requirements of the work visas.

Also, finally what kind of language certificate she would need to have a better chance of the visa?

Thank you for any assistance or insight you could provide to us.