How to process commands?

[DobriterNV95]

In short:
=======================================================
мain:
мain:

=======================================================
rtpCommand:
rtpCommand:
=======================================================
plugin.yml:
plugin.yml:
==========================================================
And what do I get?:
Console:
Console:
=
PLayer:
PLayer:

Can you help me? I just need it to work properly, and I'll figure out the implementation /rtp myself.