US Immigration from England

I was recently on here about to bite the bullet for a K1 visa but during our last visit we married and are now looking to file for the CR-1.

I have been reading a lot of things about the CR1 and only just found out that you can apply online instead of mailing everything in. Has anyone got any experience with this and is it any easier this way?

I also found myself on this website https://travel.state.gov/content/travel/en/us-visas/immigrate/the-immigrant-visa-process/step-1-submit-a-petition/step-2-begin-nvc-processing.html and was reading about how there are a number of visas limited in each case. How does this affect the application if we were to apply in the near future?

Another question is, if we married in December, is it a red flag to apply for a visa so quickly? Also, we only had a small courthouse style wedding with no family or friends present, we are just desperately trying to be together and didn't want this tiny wedding to be what we visioned as the best day of our lives, if that makes sense?