My first score using MuseScore

It's a lead sheet actually, melody and chord changes. There are a couple things I could not find in the manual. First, I want a bit more space between staves, it's a bit crowded. Second, I'm not sure I'm doing tempo cues correctly -- I think I was using System Text to enter them. At first, all my ties were slurs, LOL, so I had to go back and fix that. Please let me know what you think. Thanks