You would review prior answers and videos (link follows)

by R. Proffitt Moderator - 7/8/13 11:29 AM

In Reply to: How to install a car stereo by Patrickrock

Read and watch others such as found with https://duckduckgo.com/?q=how+to+install+a+car+stereo

Then you would choose your new system and then ask the seller how much to install and decide if it's worth the effort.
Bob

PS. Spam free zone. Links to sale sites are verboten.