Hi Charlotte and a warm welcome to you from all the Staff and Moderators.
I'm giving you a link to our
Opus page for Sussex, which has links to the various articles on places to visit in the county. Perhaps you'd like to look through them and see what appeals. If you want any specific information about any of them, just post back in here with you questions.
My knowledge is more the west Bognor/Chichester area.
My particular recommendations are for Pulborough Brooks, Arundel, Pagham Harbour, Chichester Gravel Pits. To the east Rye Harbour is great too.
I'm sure you will enjoy it here and I look forward to hearing your news.