@anon26291527 and I have created a discord server for division 3 level mashups. In case you don’t know, mashups are just custom contests that will be held in codeforces. We plan to host mashups regularly so that we can improve. One benefit of mashups is that people compete against you. You will know if you’re slow or can’t solve problems which people of roughly the same skill level can.
We invite you to join our server.
Here is the link.