Help, I'm a newbie!

Katelyn
Hello everyone! DH and I TTC for just 1 week now, so very new to this. Did check out the acronym list, but looking for a bit more guidance.
Is preseed necessary or only for those struggling to conceive? 
Also, we have been BD every day. What would be the benefit of the ovulation tests? Is it mostly for people who are wondering when to have sex who aren't doing it every day? Thank you for the help!