Hello Carlos!
I was pretty much in the same boat you are in now quite a few years ago. As a matter of fact, it was those very wrecks. While I don't have my log book in front of me, I would guess I dove those wrecks around the ~20 dive mark and I only had OW at the time. That's all that was required by the charter I went with.
I actually dove with them for three days and we did the one of the wrecks on the second day. I don't remember which one but it is the one that sits perfectly upright. I will tell you that I was nervous about it because I think maybe 70 to 75 ft. was my deep dive to that point. But I was with a very good friend who had got me into diving and he was quite experienced with several hundred dives under his belt and was a certified cave diver as well. (Not that you need that to do this dive but just shows his experience level so I felt very comfortable with him as my buddy. Don't know how he felt about me though

)
Anyway, I remember starting down the anchor line/whatever and looking down and thinking, damn that ship looks small and it's suppose to be really big. Well it was by the time I got to it. In the end, it was a really great dive and I did fine!
Honestly, I guess you have to be the ultimate judge of your abilities and comfort level in the water and at that depth. I would suggest that if you are going for more than one day of diving, do some of the reef dives the first day or so to get back that comfort level in the water before you go for the wrecks.
Good luck, be safe, and have fun!