New to scrubbing and reefing

Looks good, it seems to be doing a pretty good job of growing algae. Now that you've accomplished that initial part, leave it be for at least a few months. Meaning, don't go changing anything at this point. The only thing you will want to do is go easy on the harvesting. Every 10-14 days, remove about 75% of the growth, and rinse. It might not take much effort to remove algae, but since yours is open-air, it will tend to anchor a bit stronger because it has to. So if you have to scrape a bit, that's OK. But I defer to pulling algae off by hand as that leaves a bit more behind.

If you scrape, use a plastic scraper or old credit card and go "up" or against the flow path, and "drag" rather than "chisel". You should get most of the way there on a cleaning with one pass and a quick rinse.

 

Nope, that's a good harvest technique. You could remove a bit more but if it doesn't come out of the holes easily, don't intentionally try to remove more

 

That does look a bit better, filling in around the edges, looks a little thicker

There are many bryopsis strains, most of them are resilient enough that a scrubber will have a hard time out-competing them unfortunately.

You can treat the tank with Fluconazole (I think that's right) and take the screen off, do a light harvest, and put it in a 5g bucket of tank water (pulled before treatment of course) and it will stay alive for a few weeks, eventually it will mostly die off but keeping it wet will allow it to kick back in pretty fast after treatment is done and chemicals removed - even if the screen looks bare, it's not.

Hopefully this advice is not too late....sorry, life is throwing me curve balls one after another