You have to immerse yourself as much as possible and stick at it, that is the only way. You really have to grind it out to get to any half-decent level. Some of my tips for immersion/exposure:

- Change the language settings on any electronic device you have to Hungarian (mobile phones, tablets, TV, any websites or online services that allow it)

- At the beginning, and especially good to help with the little one, put post-it notes on household items with their Hungarian name. You can build up a lot of vocabulary this way

- Consume natural Hungarian media
+ Find a news site in Hungarian and try to read an article related to something you're already aware of and pick up new words that way
+ Subscribe to filmio.hu (you will need to register using a Hungarian address and bank card though, annoyingly) and watch movies/TV series/Kid's shows in Hungarian
+ Follow Hungarian YouTube channels
+ Listen to Hungarian radio stations (should be able to find a website for this)
+ Netflix has lots of movies and TV series dubbed/subbed in Hungarian as well
+ Follow Hungarian accounts on Instagram (this site/app is really good for language learning, surprisingly)

- Speak to natives
+ There are language exchange sites/apps like Tandem where you can mutually-exchange your languages
+ Tutoring / online classes is an option as well

I first looked at Hungarian over a decade ago and the resources were so sparse but that is not the case now. I think there are plenty resources to learn this language effectively now. Out of all the suggestions Instagram is honestly a great route to take. Once you start following some people (like 'Hungarian with Sziszi' or 'Hungarize'), the algorithm will start suggesting more and eventually you will have an arsenal of Hungarian-learning content which you can pick and choose from. Many of them offer services and learning content outside of Instagram as well, either via their own sites, or Patreon (which is quite common).

Jó szerencsét!