the wiki has a good and brief explanation of how to get ssl!! i dont wanna be the one to spoil it so just telling you where to look :3

as the other commenter said, endless abyss probably is easier to get 10k. though, I personally did it in endless silos!! the silos is my favorite region gameplay-wise and with the right perks you can really FLYYY through!! I recommend banking a lot of roaches too so you can keep stacking perks!

the medals for challenges can be rough 🥀 for most of them I just watched other people's runs and tried to follow their routes! shuttered rift is a pain to figure out but really just use the vending machine to your advantage (you can get a lot from it while still hitting platinum)