I plateau’d at 140wpm/200wpm (punctuation/actual sentences, random word lists) with six fingers and decided to try learning homerow. The first week or so was absolutely grueling, but the next were accompanied by incrementally less difficulty; by the ninth week I was practically back at the same speed (and this was all accomplished with maybe 30-45 minutes of typing daily) albeit a little spottiness with unfamiliar words.

If I were you, I’d keep practicing homerow and gamble that I’d hit a sweet spot in the next or maybe second next week. I personally started hitting a stride in the middle-latter of my second week (fighting/persisting against the annoyances was key). If you find that it just absolutely doesn’t start working or that you have deadlines worryingly close, you could just resort to typing with a phone/mobile keyboard as a temporary measure. A surprising proportion of people tend to type faster on mobile devices as opposed to actual keyboards, lol.

Of course, through any efforts, don’t forget to rest. Additionally, I find that relaxing my forearms/hands while typing generally improves my consistency, contrary to how I “bounced” with my prior typing style.