Decadent Drams Mortlach 20-year-old is a Speyside single malt whisky bottled at cask strength from a first-fill bourbon barrel. For a novice drinker, that usually suggests a fuller texture and a profile led more by vanilla, oak, and orchard or citrus fruit than by smoky notes.
At 20 years old and 50.1% ABV, this is likely to show mature wood influence alongside the distillery's character, with the higher strength bringing extra intensity. Expect a whisky that may open up well with a little time in the glass or a few drops of water.