I have an Erika with a helper row, and had it about s year. It has an identical 2 row layout to my other boxes. I adopt the idea, that the helper row is like nettles, don't touch!
My other boxes are straight 2 row boxes and I use the chin end acid nettles quite a bit so rather than confuse my poor brain I haven't gone to the helper row yet. I know it's sacrilege, but I really don't want to confuse myself. In a while I'm sure I will try though!
My other two boxes are a Tommy with a small keyboard, and a Hascy with a standard size keyboard. Having learnt on the Tommy, I had to get used to a larger keyboard. Now I swap happily between the two. Just keep playing the Lilliput and you will get used to it. Probably true for the acid nettles too, you'll probably get immune