Decided last night to try for a baby

We've been married for 3 years dated for 3, he is my first and only and last night we finally decided to try for a baby so when we did the deed we didn't know what to do started looking up tips about putting your legs up and laying flat lol well since we have no idea what we are doing we are looking for tips and tricks and no no's that we should look out for like things we can use and things we should stay away from