My oldest has moderate to severe hearing loss in both ears. We didn't have hearing aids for her because we were told they would be $4000, and insurance won't pay for it (most don't). It wasn't until our daughter was around 12 months that we found out we could get hearing aids for her through the school system for free. So, if you decide to get some type of hearing aid, be sure to look to your school district for help if you need it.
We couldn't get her to wear her hearing aids until she was 18 months old. She is now 8 years old. She has been consistently 18 months behind when it comes to speech and communication because she rarely heard anything without her hearing aids. She's closer to a 6.5 year old in the comprehension area. In all other areas (except her tiny size), she is equivalent to an 8 yr old.
If I could redo it, we would have gotten her hearing aids as a baby through our school district. I know she would have ended up going through a phase of taking them off, but at least she would have had months of wearing them prior...and months of hearing and learning to help her be closer to her age with that. I felt really annoyed for a while at the lack of help and knowledge from doctors who should have known to tell us to look at the school district. She was our first, so we didn't know we could do that!
I know it's a little different with your daughter, in that she has a good ear, but I would seriously consider getting her some type of hearing aid. There is a lot of natural learning they do as babies that she can benefit from.
My daughter also has problems hearing endings to words, differences in certain letters, and directional hearing. It affects her ability to speak as normal as others. But, I think since your daughter has a good ear, it might compensate for that problem where her other ear is lacking.
I know it must seem really hard right now! It's hard to not know what to do. So, if it helps at all to have my opinion, I would get her a hearing aid, and I would look to the school district to provide it. They can also do early childhood education where they come to your home and see how she's developing (at least they do in many states). But if you don't want their help like that, I think you'll be just fine getting the hearing aids from them. You don't have to have more than that.
My daughter's hearing loss isn't really a big worry to us. It definitely causes some issues in many other areas (comprehension, ability to understand well enough to learn, communication, etc), but they are awesome kids and you kinda get used to it:-) You'll do great...even though there will likely be times that are a bit more difficult. I sometimes feel my heart break a little when she's talking with other kids, and they have no idea what she is saying (she also has a cleft - only on her soft palate, so it's not visible, but it makes it even harder for her to speak).
(((hugs)))
Hope that helps!