Well im not best person for advices but , yup for me single notes to took while, since i couldent whistle but in time some how i managed to play single notes by my self without outer help , just lisent, play, lisent, ok sound correct - go to mirror make lips in O shape try to blow / draw watch out from 2 and 3 draw - or use word you - for beginers - like i am still for 1 - 1,5 year
he im not takeing harp seriously but i have 9 harps in drawer lying .
Find some good melody wich you know very well play it 1000 times till you get ridd of hising sound . play 1 - to 10 blow jsut try try trry never give up
also correct breathing, words you say trought harp, mouth jaw positions to much stuff .......
ok wait for others advices im not right person to give lessons but i jsut share my personal experience ... and my english is crap ///
greetings & wellcom aboard ....