You already have liturgy
We pentecostals so often misunderstand "liturgy" to mean "boring and scripted." That's funny to me because the service at our church this coming Sunday is also scripted. I know at a certain time, we will stand for two songs, sit during the offering, stand up again on the third stanza of the offeratory, then have a fellowship accross the aisle just before the Pastor begins speaking. Believe me, you have liturgy and have had it a long time; maybe it's time to rethink it.