I have a FNIRSI 1013D, it has a large display and actually decent, if primitive, touch screen controls. You even can export waveforms in a proprietary but reverse-engineered format. Pleasant device overall, it’s both portable and ok for desktop use.

If you’re doing mostly digital circuits, I’d consider a very basic scope for dealing with power supplies and PWMs (but skip the cheapest single channel ones, you’ll want the second channel very soon), and consider getting a separate logic analyzer that can decode common protocols on several channels. You won’t need that if you just work with popular modules though.

Unless you're actually designing new circuits versus just connecting modules together, you probably don't need an oscilloscope. Maybe if you're debugging some faulty module but you're more likely to just buy a new one. A multimeter is an absolute must though, especially if anything in your design is adjustable/tuneable in any way.

As already been said, an Oscilloscope is for more professional work. As an example you can take a look at the iPod Remote Protocol (https://tinymicros.com/wiki/Apple_iPod_Remote_Protocol) or watch Jeff Geerlings video about the device (https://www.youtube.com/watch?v=IRBT0N67YFA)

In general you probably don't ever need one, if you're not too serious into electronics - that is why I put one in the "more advanced" listing.