US Immigration from Kenya

I went for the interview on 4th December 2020, my babys certificate had an issue and was asked to provide evidence of our relationship. I sent all reqired document in one week. After several weeks my case being on administrative processing, i sent an email to the embassy and my case and in four days it changed to APPLICATION RECEIVED-NON-IMMIGRANT. its been two weeks now in the same status. who else has received the visa and how long did it take in APPLICATION RECEIVED status.

My beneficiary is 8,000 miles away... can she draft up a Letter of Intent to Marry, sign it, then scan it and send to me to print?

I'd rather do it this way for the sake of time (trying to get the petition done ASAP). Should i just bite the bullet and have her send it to me via snail mail?

I notice that most/many applications have photos of the couple meeting within two years.

We have been together 6 years... anyone who's been in a long relationship knows that most pictures are taken in the first two years (the honeymoon phase) then after that you have kids and suddenly there are lots of pictures of the mom with the kids, the dad with the kids, but few with both mom and dad in them.

My question is... i have 2-3 pictures of me and my beneficiary that fall within the 2-year window. I have a lot of pictures that actually display romance and affection etc but they are older than that. Is there any point in including them still, or will they be automatically discredited?

Is a child's CRBA (both our names on it, within two years) a good idea to include?

Bear with me please, i'm new and i just wanna get this right. I've seen on youtube some people fill in "N/A" and some people leave spaces blank. What are the thoughts on people who've done this before?

I am aware of instruction page that says:

3. Answer all questions fully and accurately. If a question does not apply to you (for example, if you have never been
married and the question asks Provide the name of your current spouse ), type or print N/A, unless otherwise
directed. If your answer to a question which requires a numeric response is zero or none (for example, How many
children do you have or How many times have you departed the United States ), type or print None, unless
otherwise directed.

The uscis website doesn't mention the g-325A form but I saw it on another website (usimmigration.org) and am wondering what to do now.