Remodeling Kitchen/Bath - Where to Begin???

We just moved into a home and want to redo the master bath and kitchen. We were thinking of starting with the bath as that will be a smaller job and less complicated to figure out. We've never done major remodeling before and aren't sure how to begin. Do we call a general contractor? Or go to a specific kitchen/bath remodeling store? Do we start with a designer? We have some ideas of what we want but would be interested in seeing if they are possible or if there is something else we haven't thought of and how much it will cost. Where do we start??? TIA

hi. you have a job ahead of you.
just my 2cents worth, work on the three what's

what i want - what i need - what can i spend.

is it for a family , or a show room, the last one you will spend a lot of money for looks and be cleaning it all the time. anyway the last time i did a reno on a house i got in a transportible bathroom from coats hire for 2 months. this alowed me to pull the bathroom apart without not having some were to go. as well as that i did a scale model of the area, just remember if you move fitting or plumbing it's going to cost