Do you plug directly into the Zoom? (Which means I would need to also get something or other to plug into it from whatever pickup I end up with? Remember, the "dummies" part is for real. I really know nothing!) The Zoom seems to have a speaker? (Some of the YouTubes I looked at were using complex setups with the Zoom, which I'm guessing isn't necessary.)
Hi Joyful Uke - Having owned a Zoom G3n I can offer the following advice about the Zoom G1 Four because they are very similar.
1. You don’t actually need a pickup to use a looper, but for the sake of simplicity let’s assume you have an under-saddle pickup or stick-on passive pickup installed. You’ll plug a 1/4” cable into the uke and plug the other end into the input jack on the Zoom.
2. You can then either
(a) plug head phones in to the Zoom output jack - you may need a cheap cable adaptor to do this (1/4” to 3.5mm). With this option you won’t need to buy an amp
OR
(b) run a 1/4” cable to an an actual amp. Amps I have used are Roland Mobile-AC, Roland AC-33, and Bose S1. All three sound fantastic with a uke.
3. Choose the effect(s) you want - reverb, delay, graphic equaliser etc
4. Choose the Looper option, record a phrase, then play over the top of it, or dub further phrases on top (percussion beats, different effects etc).
The effects on the Zoom won’t disappoint, but the downside of the G1Four is that it only records for 30seconds, and you can’t save your loop (I currently use a Boss RC-30 looper btw).
Now here’s the thing - I use a looper to busk with, and yes, in Sydney we are currently able to do this again. But you can have as much fun at home just playing your acoustic uke into the inbuilt mic of an Apple iPad or iPhone, recording it in GarageBand, playing it back as a loop and playing back over the top, or even recording another track over the top. GarageBand comes free with current Apple devices.