Check some relevant videos in you tube, you will get a fairly good idea. If you cannot assemble it yourself get it done from a person who has some knowledge of this stuff. Just be careful not to fit speakers in any random box, there are calculation for box volume. Impedance of speakers and wattage matching with the amplifier. Quality Crossover, damping material and box material all plays a very important role. All in all it is project in itself, one wrong step and the speakers will not sound right.
Make 2 way speaker, it will be easy and good for the purpose/application or else you can buy active bookshelf speakers of some decent brand.