What recording gear do I need?

[LFOsToLFOs]

Hi, I am new to synthesizers, but I am very interested and have a LOT of free time. I want to start composing electronic music, but I'm not sure what gear I need to buy in order to record my synths into my computer to mix, sequence, or otherwise f*ck with.
I'm just looking for some sort of interface to record my synths into my computer, what should I buy?
I have a Dave Smith Instruments Mopho module and a Roland SH-01, and I will soon be buying a Mopho keyboard (for polychaining) and an Ms-20 mini once it is released.