Welcome.
Go back and complain. Phonak likes to say “love at first fit”. That’s not true, but it should not “hurt”. Especially since you have worn earmolds before. (I have not and would expect some time to get used it it-- still “hurt” would send me back for a re-fitting.)
I’m comfortable in myPhonak but I am a geek.
The main screen lets you set Volume, and a choice of Programs. AutoSense is the default and makes reasonable choices to fine-tune the sound for the situation. Restaurant brings out voice and reduces non-voice sounds (noise). Voice is mostly midrange and music has bass so the Music setting gives a fuller sound.
Top right bars open some options. Unless your provider has offered you Remote Support, most are of little interest. (Under My Hearing Aids you can get a report how many hours a day the aids have been on. The “Bluetooth” option is too geeky even for me, don’t go there.)
Down at the very bottom of Remote Control is another options menu. Top sliders (shown above) adjust Bass Mids Treble. I am annoyed by kinky sizzles and have turned Highs down a bit (not a complete answer). Volume is just another volume control. Noise Reduction reduces low non-speech sounds (but may nick soft speech). At home I prefer to hear those, so I set it to zero. Speech Focus is directionality. Zero is all-around, full right is like a flashlight pointed in front of you. Seated across from and facing my lover I set SF very high, wandering the supermarket I set SF to zero so I hear ‘excuse me’ to the side or behind me. Dynamic seems to trim the lowest sound levels to drop-out soft meaningless background sounds. (More info welcome!)
If you change settings, you can save them as a new program, but this is very awkward. Hit Save, and it asks for a new program name, but on my screen the text spills off the screen. Ah, hit the “x” and the suggested too-long name vanishes. Touch the box and type a name for your custom program. I like “1” “2” “3” until I know a specific use.
But you may not want to bother with custom programs. AutoSense does the right kinds of things. Calm seems to cover most easy situations very comfortably. If you are in a place with bad rumbles, the lower-right options box lets you temporarily take some bass out of the sound.