Definitely try to get Sci-Fi. It is like being at a Drive-In, and you sit in a "car"watching old Sci-fi clips, in the dark, under the "stars" - very cool atmosphere. I would only do H & V if you have characters you or kids want to see there, since food is not exciting. Brft and lunch have Disney Jr. gang, and dinner is Minnie's Seasonal Dinner - if this is what you have booked, if it is for the Christmas season, the costumes are great, and you get pic w/ Santa Goofy, and meet Mickey, Minnie, Donald, and Daisy.
Fantasmic! is the night show at HS, which is a great show in a stadium near Tower of Terror, that is shown once or twice a night most of the time. The meal you booked is a package that includes reserved seating in a certain section for the show that nt. You do not have to have that to get a seat, you will just have to line up early to get in the show, and will take any seats in the open sections. You can also try to get it as a 4th FP after you have used your first three. This also gives you an easier way to get in and get seats. Since you mentioned you are new to this, you will get three FP each day, and at HS they are tiered(as well as at Epcot) so you can pick one from Tier 1, and two from Tier 2. Fantasmic! Is in Tier 1, but you will not want to pick it as your 1st choice, as you will most likely want Toy Story Mania or Rock n Roll Coaster. Toy Story is fun for the whole family(again not sure if you have kids with you) and has long lines all day, so want to do it first thing at Rope Drop or FP it, or both to do it twice in our case cause we love it! Rock n a Roll a Coaster is a fast ride with loops in the dark, so not for everyone, so you will pick what is best for you. It also has a single rider line as another way to jump in line if only certain people want to do it, or if people don't mind riding by themselves, if you don't want to choose as your FP. In Tier 2 you can choose Star Tours, Tower of Terror, Indiana Jones show, Beauty and the Beast show, etc. I know that is a lot of info - hope it helps give you some ideas for planning!