I agree, post your entire hearing test results. But, just going on 20-40 Db loss, you will have lots of choices in that range and you may not need a top-of-the-line hearing aid, but I’ll leave that to the experts.
I am trialing a type of behind the ear hearing aid that has the receiver (speaker) in the ear canal (called a RIC or RITE). The other kind of behind the ear has the receiver on the main unit and feeds sound down a small tube and into the ear.
Both work fine. I’ll probably stay with the RIC (Receiver In the Canal) because the main unit can be tiny this way and the whole thing is pretty stealthy.
If you really want to have something that is hidden you could look at the Starkey Soundlens or the Siemens iMini. Both are supposed to be invisible in the canal (IIC) and they fit your loss range. Your professional would have to determine if your canal shape would work for either of those.
If you have a Costco nearby they usually have a display case in the hearing aid center where you can look at them and even wear one around the store to try it out. I’m sure they would require a hearing test or for you to take the results of your other test with you and probably some kind of deposit until they get to know you.
This is a great place to ask questions so fire away.