There are several options to go all around Nicaragua.
You can choose different shuttles services like, go local nicaragua, Adelante express, iskatravel, . They run between diferent destinations, are reliable companies and the prices are not expensive more if you travelling alone.
www.golocalnicaragua.wix.com/nicaragua
www.adelanteexpress.com
www.iskratravel.com
Renting a car in Nicaragua, here is a list of different companies that provided this service, all of them are authorize by the institute of tourism. INTUR:
https://www.visitanicaragua.com/result...
Public busses… That will be the cheapest option. They run frequently, are not comfortable cause the most they put inside better for them even in the middle, they are always delay and there is good possibility they broke town at the middle of the road, but is a funny ride if you have the time, For more detail info you can ask at the forum.
Also, you can check the following bus schedules site: https://thebusschedule.com/EN/ni/index...
Flying in Nicaragua you have to use small regional Planes as la Costeña. La costeña flies to Bluefields, Corn Island, San Carlos and Puerto cabezas. The airlines have a baggage allowance of approximately 22 pounds per person.
https://www.lacostena.com.ni/default....
Hiring a taxi
Taxi Managua This is secure and reliable transportation but not cheap
Sometimes driving in a place that you don´t know is a bit difficult, so some people rather hire a taxi, taxis are abundant, but is a bit difficult to know which one is pirate or not, taxis in Nicaragua don´t have an specific color and many can have the taxi sign on top but the ones that are not pirates are the ones that has a red/white/red license plate. All others are illegal and are probably not insured or safety inspected on a regular basis.