Equipment is fine, good, very similar to what I have. You don’t need a pre-amp for the Rode, but you’ll want to definitely play with the gain.. I keep mine at 3 o’clock. But the second XLR cable is confusing me (what kind of laptop)?
You need the one XLR from mic to interface, then the interface plugs in via provided cord to USB port on your laptop. I know you may have to get an adapter for some MACS, but you don’t need a second XLR cable. The scarlet solo only has one XLR plug anyway.