I struggle with clarity of voices, hearing music and feedback in groups louder than individual
My Costco can’t book an appointment for me until June. 
That is insane that your Costco has that long of a wait. I wonder why. Maybe they can’t find hearing specialists t in the area. Mine Costco I can usually get in within a few days. Sometimes same day!
Hearing aids are going to help you for sure, but just a warning not to expect a lot from them. They amplify the sound and can process the sound in different ways, but it is still a struggle (for me anyway) to hear speech with good clarity, to hear specific things in a noisy environments, and to enjoy music. Although I am starting to adjust to music settings and can get it to sound good enough that I don’t get depressed.
Good luck with your journey!