Toddlers can learn lots of thing by rote; the alphabet, how to spell their name, numbers in order, theme tunes, nursery rhymes. At 14 months, they are just learning to repeat the sounds they hear. That's a useful stage of development and it's important to support it but they have no concept that the names of the letters relate to creating meaning through text.
I've known a toddler who can name all the parts of the internal combustion engine and another who can sing football songs. It's all valuable but it's the act of learning something, not the content that matters.
Talk to your DD lots. Name the parts of her body as you wash them and put clothes on her. Sing songs (any songs) and make music together with your voices, toys, pots and pans, etc.
Talk to her about familiar people and routines and real books to her lots. Follow the text with your finger so she learns that we read text left to right and will start to realise that the words you are speaking are related to the text she is seeing.
Talk to her about having more, or things that are big. These are important mathematical concepts that they can learn early on.
Knowing her alphabet and being able to count to 100 won't help her when she starts school, However, loving books, having a wide vocabulary alongside the confidence to express herself and being a resilient, enthusiastic and independent explorer of the world will stand her in good stead.
Don't teach her letter names or sounds without finding out how the school she will attend teaches them. If you teach her that 'a' says ay, she will find it harder to learn the right sound ('a' as in cat).
Have fun exploring the world with her and give her a head start by supporting her to follow her own interests, ask lots of questions and have resilience to learn from her mistakes and keep trying again.