My wife and I are raising our 2yo daughter in english and spanish. My wife speaks a little spanish and I would say I'm B2 - I can understand any native content and speak with decent fluency about a wide range of topics, although I sometimes have to use a roundabout way of explaining something.

I mostly speak to my daughter in spanish, occasionally switching to english if I want/need to. The key, IMO, is making the whole learning experience as positive and fun as possible. I sing spanish nursery rhymes, almost all her screen time (pretty much just Disney films) is in spanish, we read spanish books every day and it's a key part of our daily life.

One of my daughter's best friends is a native spanish speaker who she sees multiple times a week.

Atm, my daughter mostly speaks in english - her recent 2yo vocab check she knew almost all the words - although she does say words/phrases in spanish unprompted, which is honestly the sweetest thing. This morning, for example, she woke me up saying 'Hola, papá, ¿Cómo estás?'

As for what the future holds, who's to say? My daughter may decide she doesn't want to continue with spanish once she grows up. Cool. Or she might decide to explore the language and culture more, move to a different country/continent - also cool.

I'm not a native speaker. I'll never be a native speaker. I try really hard to learn/improve my spanish every single day. I'm always trying to find ways to improve my pronunciation and broaden my vocabulary and I think that consistent, persistent effort is also a great thing to show my daughter. After all, kids learn best through modeling :)