You don't need magical powers to choose the right curriculum.
Do some research, talk to veteran homeschoolers, and reserve the right to change your mind if what you're doing isn't working.
We have tried quite a variety of curricula over the years. Some have been great for us, some have been horrible for us. What I've learned is no ONE thing works for every family (or every child within a family). As your child gets older, you'll likely naturally realize their learning style. I'll review what we use and what we've tried. Why it works, or not, for us.
Saxon Phonics - a thorough grammar and spelling curriculum. Did not work well for us because it moved too slowly. Great for someone who appreciates the details (like me), but not for someone who needs things to stay moving (like my son).
Usborne Grammar workbook - a fun supplement, but I wouldn't count on it for a complete curriculum
Easy Read (online) - LOVED this! I am so thankful we found this. My son struggled with reading due to an eye tracking issue. He was losing confidence fast. These are fun, short, game-based lessons that WORK. It even includes eye tracking tests periodically (evidently it's fairly common but often missed).
The Good and the Beautiful (TGTB) language arts - we love this for elementary (that's all we've done so far). It incorporates grammar, spelling, literature, and some art. We do supplement with workbooks to review concepts. Lessons are in small bites.
Usborne Math Dictionary - this probably doesn't qualify as a curricula, but we used it until 3rd grade. We simply took one concept at a time and used manipulatives as practice.
Usborne multiplication workbook - learning multiplication tables was a primary focus one year. We used this along with some word problem workbooks and TGTB Musical Multiplication.
Math Detective - great workbooks for adding another element/application to math studies
The Good and the Beautiful math - we love this, too! It makes sense, gives real-world applications, and comes in small bites. It also can move as slowly or as quickly as you want.
Story of the World - we enjoyed this for an intro to world history. Great for a variety of ages. Available on CD as well. We used the activity books to add a hands-on element.
The Mystery of History - this is similar to Story of the World but with a Christian perspective. We enjoyed the variety of activities for all ages.