US Immigration from Slovenia

My husband and I recently decided that's it's finally time to reunite after nearly 2 years of being apart. I have been looking into travel restrictions for entering the US a lot, but am still confused as to how complicated it would be for me to travel. I am already vaccinated and plan on getting tested before my departure, I'm just having issues understanding how to prove that I'm eligible for entry. The US Department of State has posted on their website that noncitizens who are spouses of US citizens are not suspended entry, but I'm wondering how to go about that, what is the proof I need to present etc. Any help would be greatly appreciated.

https://travel.state.gov/content/travel/en/us-visas/visa-information-resources/covid-19-travel-restrictions-and-exceptions.html

Hello,

my name is Mitja Duh, I am a citizen of Slovenia, Europe, my wife is an USA citizen and she is pregnant with our 2nd child. Her due date is September 27th and she will have to have a C-section. Of course, she would need help with the baby after birth and we are wondering, if there is ANY WAY that I would be able to visit her in the USA, be there for the birth of our child and afterwards help her with the baby ...?

We would be so much grateful for any answer or insight on this matter.

Thanks to anyone who reads the question and answers, I so much appreciate your time.

Best regards,

Mitja Duh

My husband and I have been married for a year now, and we've finally been able to afford to start filing our petition. Since I've only visited him once in the US (ESTA), we do not have plenty of 'proof' of our relationship. We're about ready to send in our petition, with a big lack of any primary evidence. What all can we include in our petition, and what is the process to getting someone to write a letter of a bona fide marriage (does it have to be notaried, who can write it for us etc.)?