Always wanna create a site like coingecko or coinmarketcap. But does not know how and where to start. Even, does not calculate the budget. I need a figure or plan on how to start. Now things are seem complicating, does I need to learn basic web developments for management it.
Note: Not finding any developers.
so now, you still need to know at least something about the backend. If you don't know anything about it or you don't have enough skills, the best suggestion for you is to turn to something else or start learning a certain subject.
it is not that I only criticize will give you some hint. Try to search about WordPress and "coinmarketcap" plugin for them. for a relatively "small" amount of money, you can get something similar and functional, and someone else is already making fixes and changes.