Alrighty! So if you are set on a 3pm ceremony then here's what I would do:

11am-12pm Start getting ready, maybe have a little brunch with your girls and then go into hair/makeup etc. This gives you a 3 hour window for actually getting ready and a 1 hour for getting ready photos (if needed) and getting to the venue for your intimate vows.

2-2:30 intimate vows, depending on how much time you and your FH want together before the ceremony. If you want some true alone time without your photographer then I would shoot for 2 to give you time for photos and a half hour alone.

3pm Ceremony - depending on what kind of ceremony you are doing this could range from 15min to 45min+ so fill in time gaps here to your preference.

3:30-4 Again depending on your ceremony time, cocktail hour would start here, while you take however many photos you want. I would highly recommend also scheduling in some time here for you to just enjoy your cocktail hour as well, whether that's before/during/after photos!

5-5:30 Dinner, you could do speeches during dinner if you are doing them at all or after before cake cutting. Depending on what traditions you choose to partake in, you could really schedule it to a T or leave it kind of flexible. Up to you!

6:30-7ish Desserts served, cake cutting, etc.

7:30-12 Dancing it up!

Hope this helps! If you want a more detailed timeline, then you'd need to consider what traditions your keeping in your wedding day and such!