Yes, most ham radios are customizable, but sometimes ham radio kits which are made for beginners are not. If you are just starting then make sure to know about antennas fully and then go ahead with modifications.  Ham radio kits for beginners makes it easy for anyone with interest in ham radios to get started. You will find that in case of national disasters or emergencies, you will be able to rely on this for rescue and communication. You will need to get a proper license for operating ham radios but with some effort and dedication, you will be able to do it.