Heh, thanks.
Yeah as you said the sample size is way too small to be sure about your realistic expectations in the long run, that being said any cash game player with half a clue about tournament games (like a little bit of basic ICM, push theory etc) should have no problems at what you have been playing so far just because of how soft they are. So it depends what your expected hourly was at cash games. But obviously long term you would aim to learn/improve and move up. Would recommend to continue playing, and should definitely do some study (get a study buddy, do some HH reviews/post hands here, use SNG Wizard, coaching/videos maybe, etc). Also maybe pick a format because for most people it's by far best to just play one format, at least when first learning/and a while after until you are really competent. Reason being because the ICM etc and structure in general is pretty different in the formats so learning different ones at the same time isn't the best idea.
"but is my current ROI% and ITM% good enough on average such that it will warrent me focusing on MTTSNGs?"
Don't think short term, think long term. Basically if you work hard, it will for sure be worth it in the long run
gl