I agree with Stallman that the best way to get started is to start replacing your proprietary apps with free apps and work your way down. nostr:npub1fkluklzamwpyn7w8awxzrcqe7z8mldlvthk4gz9kz3vsh6udz62s9qj48l has a lot of posts about this. First, care about freedom. Second, find Free software and use it. Third, communicate improvements to developers of that software. Fourth, help build improvements.