I'm not trying to "keep up" with completion, or even think about full completion for the time being, though I have done that in the past and might return to it someday.

Instead, what I usually do is pick one year to focus on, or sr range or length sorting etc.
I have an osu collection ingame for each year and for all of them the idea is the same.
FC map -> remove it from the collection.
At the start there are thousands of maps in the collection. I usually start by dividing it into smaller goals, most often by month or star rating. Then as the map count starts going down, the maps left in the collection start to become more challenging. When I'm at a point I have submitted scores on all of the maps the collection should only have these "challenging" maps left. That's when I move on to next year and after sometime I revisit maps in the old collection when I'm better at the game.
FC Rate I'm trying to keep on each year I complete:
<5* 100% FC
5-6* 95% FC
6-7* 50% FC
>7* 😭

I only count scores with no difficulty reducing mods for FCs, so no diffadj, relax, random allowed. For maps I can't FC I try to at least get an A rank.

- 1,000 SS
- Top 1000 Ranked Score

I hope to increase my score rank in all of the other gamemodes but learning the game first will be the main focus. Alternating with ss and ranked score farming should be good for now. I don't care about completion (yet) but I add that stat here anyways because I will be mostly playing specifics anyways. Same thing for other gamemodes too.
I'm either playing casually or not playing since standard is my main gamemode and will be for a long time