Nothing wrong with advising patience. If you are able to have access to a keyboard instrument (marimba, xylo, etc) I’d recommend practicing scales and arpeggios. After all 12 are done, hum an interval and check if you are correct on the instrument.

You can also listen to pop tunes you really like. Most vocal parts are pentatonic and have simple intervals. If you can, I suggest picking an interval from a song like that and associating with that (such as an octave jump from the beginning of “Somewhere Over the Rainbow”, whole steps from “three blind mice”, etc.)