The lady who fitted me with hearing aids said, "The good part is, now you'll hear everything. But the bad part will be that now you will hear everything."
She was right, of course. Wearing hearing aids, your brain cannot "tune out" the background noise you don't want to hear. It therefore sometimes interferes with the stuff you really do want to hear.
However, very good modern hearing aids include noise-cancelling strategies built-in, and also focusable microphones that "zone in" on the person in front of you.
It also helps if you can teach yourself to read lips, because that technique augments and better-focuses the amplification provided by your hearing aids.
Further, you must learn to remind people that you are deaf (or partly deaf), so that they will face you and speak extra-clearly, and maybe even increase their loudness.
Also, I find speaker-phones much more useful that handsets, no matter that handsets have volume controls and hearing-aid-compatible, switch-actuating magnets.
A friend of mine is almost stone deaf. He came by it gradually. His wife discovered his growing deafness by taking note of what she calls his "What-O-Meter": The number of times he said "What?" during a normal conversation was her tipoff.