set a budget, like ^^^ mentioned...
B18A1 motor is favorable to turbo as it has lower compression and better torque at the wheels... However!! depending on what horsepower you hope to achieve, you need to factor in several possibilities...
upgrading internals ( rod, valves, etc. etc..) stock internals are ok for low boost applications, but if you want to get more out of it stock parts are not optimal...
you will need to upgrade your fuel pump and injectors also. depending on the rubo manifold you could be looking at removing auxiliary components like power steering and AC, and even replacing your radiator for a half sized one...
Getting a tune from a tuner... you cannot just slap a turbo on and call it a day... you need to most likely upgrade your ECU and have a pro tuner dial in your car so you don't blow the motor up...
you need to set a plan set a budget, then work towards it. when boosting yor car you should aim to do it right the first time.
plan on dropping some serious loot to do this... it isn't a bolt on affair and will run you in the area of 5k or more to do it right.