Tom,
Welcome to the mix! I'm a newer member of the site but have found nothing short of open arms from the community. It can take some time to get things added but in the end it is worth it. Pretty quick the swap asks start coming in!
Personally, I have found it helpful to sort out the coins I'd like to add by country and then year. I'll work a specific type set or run and then move onto the next. Just to keep things interesting I rotate through continents and a pretty regular basis as well. Maybe do 10-15 countries before I move onto the next continent. If other seasoned folks have tips, I'd love to hear about those.
This article has also been very helpful:
https://en.numista.com/numisdoc/how-to-grade-my-coin-58.html. Like I said I'm a newbie so my eye is pretty rough right now but it has at least provided a starting point for some of the tricker items I have come across.
Take care and be well!