C4D's are very! simple. All you need to do is pick on which looks cool. Then paste it into a new document, select the bit u want and paste into your sig. Then you can do two things. The first is play around with the blending options like overlay etc. I normally go through them all to see them all. This is VERY important to do! If the C4D is a bad colour for your sig just double click the layer and select the colour overlay option. When on this select a colour from the sig with the eyedropper tool or w/e and then apply it and change the opacity of the colour overlay to a good medium (you have to change the opacity or else it'll be a block of colour). Good Luck!
Also id advise getting the hand of the sig making idea before adding animation because otherwise you might get distracted by the technical animation etc. and forget about basic stuff like blending C4D's etc.
The sig looks really nice but on the right like i said before add different parts of a C4D in dont just paste the whole thing in and use many different ones to add more effect. Good luck! and yourprogressing quickly

keep up the good work