From what resource do you install applications?

[andrewmart9]

Greetings, I don’t even know what to do, the playmarket has stopped working, and it still doesn’t load and doesn’t download anything, did anyone encounter such a problem? It's good that a friend advised me the software captain-droid.com/en/ where I got acquainted with the provided list of games and applications in more detail, as well as installed everything for free and without any problems.