I hate to sound impatient but I love crypto and can't wait to get started on the first set of challenges. How long am I likely to have to wait to receive them?

I hate to sound impatient but I love crypto and can't wait to get started on the first set of challenges. How long am I likely to have to wait to receive them? It's been 5 hours so far Again, I'm not meaning to be rude, I just want to know if I should set aside time to do them this evening, this weekend, or in a couple of weeks