I play both bass and keys - as mentioned, the majority of keyboard players learn to play by themselves - and piano is one instrument where it is possible to play all the parts.
Playing in ANY ensemble properly requires a different mind-set. Some do it because they don't know any better, others know better, but either go back to habit or actively are determined to be the "star."
Our primary keyboardist in church is the pastor's wife, who is a much better player than myself. At one time, she was totally by herself. Drums were added next, and then my bass. It took talking with her and explaining - she sets the tone on her amp now so that the bass notes are deemphasized. Also, as the band has expanded to a couple of guitars, trumpet, and occasionally other instruments; she has learned to comp chords and play as an ensemble player. OTOH, we have another keys player, who is an excellent player, except that the individual seems to be absolutely determined to fill every single space with notes (like a "shredder" on a guitar).
God is a God of ORDER - and order in His house should include a sensitivity to the fact that our praise is to Glority Him, not to get an ego trip ourselves. A good general rule in any ensemble is to divide the amount of playing each person does by the number of players. Even laying out for a few bars, or a whole chorus. "Trading" also really sounds good - where one chorus has the bass from the bass player, then it switches to the pianist, then to the organist. But all these things require spiritual maturity.
Ultimately, you can talk with others, some will respond, others will not respond. Amd you can talk with God in prayer, and His Spirit can convince many that you will not reach.