If you're thinking of buying a Samsung just to try Android, don't.
Depending on where you live, I would advise you to get one of these Android phones instead, which will save you some money without sacrificing the Android experience (some argued you get less Android on a Samsung anyway).
- Google Pixel 2. As pricey as Samsung, but at least you get longer shelf life, updates, and actually experience unadulterated Android.
- OnePlus 6. Flagship specs, cheaper than Samsung/Google.
- Nokia 7 Plus. Even cheaper, SD660 with Kyro cores (the same cores on the flagship SD8xx chips), Android One (meaning you get update support like Pixel phones)
- Xiaomi Mi Ai. If this is available in your country, arguably the best bang for the buck in Android world today. It's running an old SD625, but it has 4GB RAM, 64GB storage, dual camera, Android One, all for less than $200.
Other notable phones: Moto G6, Xiaomi Redmi S2/Y2, Xiaomi Redmi Note 5 AI, Asus Zenfone Max Pro (M1).
Once you look at the Android world outside Samsung, Samsung is very unattractive, way overpriced, and doesn't even deliver the experience of Android the way Google intended it to be. In many markets, people buy Samsung only for the brand and status symbol.