Look for a 510 atomizer. It's a cheap, easy way to drip flavors to test. Cisco makes some good ones.
Cisco Spec 501H Bridgeless Atomizer - Avid Vaper
Yep, came to recommend this. This was "dripping" before RDA's were a thing. A lot of vapers still use these atomizers as their go-to "taste-testers" because they're damn consistent and provide a really great preview of a flavor. Also it's very easy to drip drip, vape dry, (new flavor) drip drip, vape dry, etc., because there's not a lot of space in there for juice to get all up in the cracks and crevices. Also, they're pre-built to specific ohms, so learning how to build is not even necessary!
Straight-forward and pretty much exactly what you're looking for.
In the future, though, RDA's are pretty neat, and building isn't as hard as people might make it seem to be. Definitely worth the research.