Hi my name is michelle I don't know how this all works so hopefully you guys can help me

Hi hope everyone is OK, me and my partner have been together almost 17 years and we have finally decided to tie the know ivenever been happier not only am I getting married but my 3 children are going to be there for our special day, unfortunately some of our loved one sadly won't be attending our big day but I'm sure they'll be there in spirit with us. I'm excited to plan our big day but as you can all imagine very nervous as I don't have a clue what I'm doing so hope you guys can help me out