Sperm???

An

Hey guys I have a few questions about the mans side of the dance I'm having a hard time wrapping my head around and believing that sperm can get where they need to go we did the deed in the perfect time frame and I layed down for a good 45 mins to an hour right after. TMI but nothing leaked out till I got up to wash up . But I just cant believe sperms can swim it happens on such a microscopic level and it seems like such a impossible journey.... looking for reassurance

Also I feel like I need to explain I was homeschooled so I never had any sex ed or any biology courses all this information is so new to me and I feel ashamed that I never really understood it until now and I'm in my late twenties.