Which tournaments or categories would best suit me or my child?

NTRP WTN Recommendations
MS 5.0 (WTN 20+)WS 5.0 (WTN 20+)
MS 4.5 (WTN 22+)WS 4.5 (WTN 23+)
MS 4.0 (WTN 24+)WS 4.0 (WTN 26+)
MS 3.5 (WTN 26+)WS 3.5 (WTN 28+)
MS 3.0 (WTN 28+)WS 3.0 (WTN 30+)
MS 2.5 (WTN 30+)WS 2.5 (WTN 32+)