Its good to have a partner, but it doesn't always guarantee faster manifestations at all. Thats really important and key to recognise first off. However good luck in your search and may the best and right manifesting partner show up with ease and joy!
Sure, and its worth while doing. For me, I have manifested things with my wife as a partner, and without anyone too... so it was just food for thought. You don't need anyone or anything to be the amazing creator that you are. However sometimes, other people can slow things down too. So its important to recognise that. Happy creating and manifesting!