I work solo often with an arranger. Then, duo with a horn player. Then, add another singer, along with my vocals. Then, a live drummer, where I mute the drums on the arranger. It depends on the gig and what the client wants. I like all the combinations, since the other guys are close friends, with no drinking, ego, or personality issues. The solo routine was the biggest learning curve-----dealing with employers, handling requests, getting paid, and all the rest. Previously, I could “hide” in a 4-piece band, as part of the furniture and let someone else handle the business end. You may have to give it a go for a while, then back off and evaluate the situation.