Careful, Google is currently forcing apps to migrate from SafetyNet to PlayProtect!
SafetyNet is used by tons of security theater apps like banking 2FA. It is an API of play services.
PlayProtect is basically the same but you have to talk to it though google play. This is a blatant move by google to make exactly what OP is suggesting impossible, and means that if you do this, you may soon see many apps break that you are forced to use.
i2p doesn’t really have exit nodes, it’s mostly for i2p internal connections.
The only exit I know is stormycloud.i2p, and that one is somehow immensely limited ro the point of it being hard to load clear-net text pages.