jaaakb wrote:
you can practice low ar at any time, it's never too early
Ya, but note that this advice was given to a rank #330, not #20k. For the OP, there are other more important things to work on at present.
I will say that it's probably a good idea to play/practice any method you find fun. I don't think it's a healthy approach to gaming enjoyment to disqualify things you might like playing, based on logical reasoning. Have fun first.
At your rank I'd recommend making collections of maps which contain stuff that you find difficult on a technical level, not just speed or AR. Classify them into collections for what they are, and come back to play them occasionally. Eventually complicated patterns will become easier and that'll help your accuracy a lot more simply because you can read stuff easier.