You can choose whatever you like from the options.
Languages, tools, methodologies, ways of working, ways of being, reacting over planning, intricate refinement, gantt charts, kanban, extreme programming, SQL, NOSQL, cloud, on-prem, kubernetes, desktop, mobile, angular, vue, nextjs.
None of it matters without customers.
Once you have customers, you’d better keep delivering.
It doesn’t matter.
Just keep delivering.