Questions About My 5 Month Old Havanese Pup?

I have a 5 month old Havanese. I have had her since she was 8 weeks old. She is an absolute sweetie, but I have a few questions about some things she does. First a bit of information…
She is scheduled to be spayed in August, when she is 6 months old. I have a 6 year old female spayed Bichon too and they are best friends. I rescued the Bichon at 8 months old. No previous puppy experience.
my questions are: she seems to be frightened of her reflection and barks at herself if she sees her reflection in the fridge, fireplace.. etc…Is this normal puppy behavior? She can be quite vocal around other dogs. I walk her regularly and have taken her to off leash parks, but due to my fear of bigger dogs attacking her, off leash is not my favorite place to go. Does she need to be socialized more? She chews my books if I do not put them up high enough. She has a lot of chew treats and toys, but books seem to be her favorite.
I have used the spray bottle thing when she barks, but she thinks its a game and loves water. I have the bitter yuk stuff and it works at times to prevent her from chewing stuff she shouldn’t. She is potty trained, knows sit, down, off, etc.
any input is greatly appreciated.. thanks in advance

3 Month Old Puppy Questions… Potty Training, Treats, Feeding, Etc…?

I’m having a bit of difficulty getting her to use the training pads, she always pees somewhere else. She is pretty good with going outdoors, but I have to be on top of her taking her out every so often, and she’ll pee on the floor between trips out. I wake up to a few poops every morning, off the pad of course. Is there anything I can do about this? How long on average does it take for the training to sink in? And when will I be able to reward her with treats for going in the appropriate place, and what brands are healthier. One last question, how often should I be feeding her, and how much.
Sorry for the long entry and many questions. I just got a 3 month old havanese two days ago, and I want to the best for her in every way.

Questions About Havanese…?

We are considering adopting a small dog and are looking at a havanese. [we will be adopting an adult dog, no puppies]
I have some questions about this breed:
1. How good are they with other dogs? Do they play with them a lot?
2. Are they submissive, generally, or dominant?
3. Are they smart or not-so-smart? Do they take to obedience training well?
4. Do they mind roughhousing? for ex, will they be tolerant of small children / a energetic household/ A lot of hustle and bustle? Or are they more snappish?
5. MOST IMPORTANT : How are havanese off leash? do they have good recall? Will they stay by your side or will they run off?
If you have any suggestions of another dog breed, please tell me! Most important is that the dog does not run away off leash. We won’t be necessarily adopting a purebred [more likely a mutt] but we just want to know the general characteristics.
please do not copy and paste from a website. Tell me your personal experience. THANKS!