There are plenty of slower folks here! I’ve seen a few level 60 celebration posts where people spent quite a few years off and on WK and still managed to reach level 60. If you want to have a community of fellow slow people to hang out with, there is the Let’s Durtle the Scenic Route thread and the Team Snails on Vacation thread.
If you don’t like going this slow and would rather go faster, I recommend checking out the Ultimate Guide for WK, which has very in-depth explanations of how WK works and how to best optimize it. Some advice I can give right away is that it’s best if you can find a way to check WK three times a day (do your lessons, then review the new items 4 hours later, then 8 hours after that). If you stick closely to those SRS intervals, you’ll remember the items better, and you’ll also get them to the next stage faster, which will let you level up quicker.