You do have a smoker..you just don't know it...I haven't got a smoker..so it has to be the oven...
I use a weber kettle grill to smoke everything on. I've had a bunch of different smokers...and this works just as good as any of them. You just have to get good at setting it up correctly for indirect heat, smoking. I use briquettes (I've tried a bunch of stuff...they produce the most predictable heat) and either wood chips or wood pellets (like for a pellet smoker...check amazon) for smoke production. If you google "weber snake method" that will be a good place to start your learning process. If you set it up right...you can cook for 6+ hours without having to open the lid...just control the heat with the dampers.
A couple examples...