a turboprop is a turbine engine, but its not a jet (turbofan or turbojet etc) engine. airlines will accept multi turboprop but i dont know to what extent it will help you. jets are more desirable because the larger the airplane the better it is for experience.

as far as flight characteristics go, turboprops give you relatively instantaneous power corrections while jet engines have a lag/lead due to longer spool times from the inertia of big turbofan engines. when you go from one to the next you will DEFINITLY notice the difference. once you get used to one or the other you never even think about it though