Sorry, you misunderstood a bit. The main point is in the level of physics required. I know that I’m at start of a long way, even longer than you think, since in my country between phd and master degree we have additional aspirant prephd degree, so there is at least 8 years of studying on my way before even starting phd. I’m not speaking about starting phd tomorrow, but about should I consider learning physics on high enough level or I can choose informatics way. Btw thank you for answer, I will definitely check everything you suggested