I HIGHLY recommend learning partial edge control (extremely easy) and a few VHF2L cases. VHF2L is the intuitive version of ZBF2L, and since many people (fast ones, even) use intuitive F2L over algorithmic F2L, I see no problem in saying you know ZB with VHF2L and ZBLL only.
As far as ZBLL is concerned, it's going to be tough. Very tough. Especially recognizing the A/A, C/O/X, O/C/X, and O/O/X cases (I think one more is tough for me, though I can't remember it now. btw, I know two full COLL cases of ZBLL).
However, COLL + EPLL (the 2-Look ZBLL) is incredibly fast, as you can refine your PLLs down to 4 and have much less to recognize. 2 sides is easily enough to reconize the EPLL case, and all EPLLs are very fast. COLL is also very fast, and I can send you my alg doc for that and VHF2L if you want. Or just look at Jason's site, then find any algs you don't like and look at Dan Harris' site.
So my recomendation: learn partial edge control, then COLL + VHF2L, and then decide if you want to move on.