There is not much information on how to rank and keep on ranking on Discover, but the main focus is freshness. When your content is fresh it will have the chance of appering on Discover. Give or take 48 - 72 hours, and the content is not fresh anymore and therefore will lose the traffic.

Google discover traffic feed is based on trending topics, so post trending topics based articles or news based articles according to your own niche! Gaining traffic from discover is tricky actually. Best of luck though!

Search engines don't care if your content is AI or not. It cares about whether the content is good or not. If your content doesn't hit the search intent or is way of the keywords you are trying to rank, then your content is not good enough.

At the same time, if they tested putting your result at the top, and people didn't like it, then Google will not keep you at the top.

Better content is the only way

You dont create backlinks like that. You either pay for them or earn them.

If you want to "create" backlinks, then look into all of your social profiles across the web.

What are your main keywords? What type of audience are you trying to get? What kind of intent do they usually have?

You gotta give it time mate. SEO is not a tactic you should do, if you need the sales now. Its a long-game, where you put in work, day after day, week after week. In SEO three months is not a long time, especially if you started from scratch.