Where's "home"? House, apartment, shared, rented owned? Of course I'm referring to noise tolerance acceptability, which also differs culturally.

That said, budget, do you want programmable modelling and what genre can you see yourself predominantly playing with it in two years time?

Necessary questions because of the confusing array of brand and model choice.

If your budget will extend to it, buy around 40W. Headroom is always good, and cleans where gain is curtailed can usually use the extra boost from the volume knob. You can always turn a 40W amp down to a lower volume, but it doesn't work as well the opposite way for most 10 or 20W.

Arguably one of the most impressive home practise small amps going in the 10W class are Yamaha's THR series, but they are pricey.

I did a comprehensive roundup writeup on home practise amps in response to another forum inquirer not very long ago. Do a search. PS. Edit: Found for you. Hotlinked in preceding sentence. As I recall they were looking for a 40W amp, but it's applicable to 20W as well as the majority of manufacturers do one.

Based on my experience. In my own case, for home learning and practise use on electric I have two which get used most at residential (freestanding houses) friendly volumes. A Blackstar ID:Core Stereo 40W and Blackstar Fly 3 Combo Stereo 6W.