Nice. Hope you like wide-angles (eg 90mm) because that's what you'll be able to use with the bag bellows. To use the camera with normal and longer focal lengths, you will need a set of normal bellows to get you sufficient extension. For example, 150mm is considered normal (it's a wider kind of normal) on 4x5, which requires 150mm extension just to focus at infinity and 300mm to reach 1:1 (e.g. headshot on a baby, picture of a hand). So definitely start looking for some normal bellows.
That Caltar will serve you well I'm sure but you won't be able to focus it at all with the bag bellows.
The "small bellows" you have are a compendium shade.
Go have a read of LFPF.