First things first, I strongly discourage people from raising two puppies at once - it's more like 3-4x the work. There's a phenomenon called 'littermate syndrome' that can impact the lifelong behavior of dogs who are raised together (they don't need to be literal littermates) from a young age. This can result in anything from them becoming intensely bonded to each other, to the point where they cannot be separated even for a quick vet visit without acute distress, to difficulties bonding to humans in their lives, to unhealthy codependences where the more confident puppy bullies the less confident one and never allows them their own space.
It is preventable, but requires you to do everything separately while raising them - separate crates, separate walks, separate play session, separate training sessions... lots and lots of work. And you not only have two baby puppies at once, but two adolescent dogs at once as well - and one of those is enough for anybody, trust me. I encourage people not to add a second until their first is 2-3 years old, mentally mature, and has decently solid foundation manners on stuff like how to behave in the house, how to walk politely on lead, etc.
As to the rest, my favorite name game is super simple. Say her name, then immediately give her a treat. Repeat this 4-5 times in a row, a few times a day. It doesn't matter what she does after you say her name, just make sure you've got the timing right - if you give her the treat while saying the name, instead of immediately after, it's less effective. What you're doing is just getting her to understand that - for now - her name means a reward coming from you. This will very quickly become her having a positive association with her name, and have her start orienting on you when you say it, even if the reward isn't immediately forthcoming. Avoid using her name - or calling her to you in general - to do things she finds unpleasant (ending play, nail trims, giving medicine, whatever she's not so keen on) and instead go to her, and it'll help keep that positive response really strong and give you a great recall foundation.
Good instincts on avoiding scolding her! Especially with accidents - she's a tiny baby and it'd basically be like scolding a toddler for wetting their diaper. Accidents never get verbal or physical corrections, just an interrupter if you see them happening (I prefer something silly like 'whoopsie' or 'uh-oh' in a high pitch because even if I'm tired and frustrated it's hard to make those sound angry) and rushing her outside to finish (with rewards after if she does). If you find an accident after it's happened, it's too late to do anything - dogs can't connect cause and effect unless the effect (reward or punishment) comes within five seconds or so of the action. Otherwise, they might learn that you act scary and unpredictable around indoor poop (or chewed shoes, or other evidence of past misdeeds), but they don't understand that their actions were the cause of your behavior.
With things that aren't potty accidents, still remember she's a baby puppy who doesn't know the rules and has limited control over her impulses and facilities. When you can't supervise, your best friend is a crate, pen, or puppy-proofed area gated off so she can't practice naughty (and/or dangerous) behavior. When you can, you can take a few approaches. If she's behaving inappropriately towards you - biting or jumping, for example, you can end the interaction. Sometimes standing up and turning away from her - no talking or eye contact - for a few seconds is enough, and sometimes you might need to go somewhere she can't follow - say, step over a baby gate - because she thinks she can continue the play by chewing on your pant legs or similar. You only need to remove your attention for a few seconds usually, and re-engage the moment she seems a little calmer. If it keeps happening - I often use three strikes - you can end the interaction permanently and let her settle in a safe, confined space for a while. If she's behaving inappropriately towards other objects, say chewing the furniture, you can redirect onto something appropriate, like a safe chew toy, and praise and fuss over her for chewing her toy instead of the furniture. Redirection, management, and rewarding her for making safe, appropriate choices about how to occupy herself (such as getting a toy to play with instead of a throw pillow) will go a long way.
