You are right. Agile, languages, CI, devops are all tools not solutions to problems. Blindly applied, they will not get the results promised.
First focus on identifying the primary job to be done: build a valuable piece of software with as little effort as possible given your current team and existing technology.
Second, consider how valuable the existing software is and whether it really needs to be rewritten at all. Prefer a course that retains the most existing value. It is work you won't have to repeat.
Third, choose tools that maximize the value produced per hour of your team. CI, Devops, Microservices, Languages all promise productivity and reliability benefits but will incur complexity and time costs. Choosing the right mix is part of the art of software management.
First focus on identifying the primary job to be done: build a valuable piece of software with as little effort as possible given your current team and existing technology.
Second, consider how valuable the existing software is and whether it really needs to be rewritten at all. Prefer a course that retains the most existing value. It is work you won't have to repeat.
Third, choose tools that maximize the value produced per hour of your team. CI, Devops, Microservices, Languages all promise productivity and reliability benefits but will incur complexity and time costs. Choosing the right mix is part of the art of software management.