When you are acclimating, put the bag in the tank for about 45 min, then start adding water into the bag.
Let them get use to temp, then to the water.
Also there will always be losses in this hobby, stick with it!
I have lost hundreds upon hundreds do to random stuff. Reef lobsters, evil crabs, heaters staying stuck on (bought digital aquatics since), some fish just didnt take. One of my tail spot blennies swam into my HOB
skimmer when I had my 46 gallon. So many way to lose, but focus on the ones you have
You are going to lose a lot more than 2 fish in the future. But when you look at your tank, if it makes you happy then continue!