Tbh I would suggest joining a company that's working on something that sounds interesting to you and has a strong sense of providing mentorship. Like you menti

Tbh I would suggest joining a company that's working on something that sounds interesting to you and has a strong sense of providing mentorship. Like you mention there aren't tuts on complex systems as a single thing. I'd say because complex systems solve quite specific things and usually delve deep into domain specific problems that aren't of interest to people outside that domain