Currents in Komodo can be strong and from time to time, unpredictable. This is why it's so very very important to dive with experienced guides! Talk to you dm or instructor and tell them your concerns.
There are several sites that require negative entry straight to the bottom where the current is mildest. Having ear problems will suspend you in midwater and basically push you off the divesite if the currents are strong enough. Other divesites, like the famous Batu Bolong, are pinnacles with sudden and strong down currents at the sides. If you are not paying attention, these can blow you off and down in seconds. And several more site are simple drifts that can be relaxed and easy to wild and crazy rides.
Factors such as cycle of the moon and tides decide the intensity and predictability of currents, and an experienced guide nows how to read all the signs. A good guide will give thorough briefings on how to work with the current and what to do in case of emergency.
when diving in Komodo dive with a reputable operator! Do NOT choose the cheapest operator! Discuss your concerns with the guide to plan an appropriate dive plan for you. It's quite easy to do dives without current. That said, the current dives are the best dives

Komodo is famous for big stuff and big stuff usually like big current.
I would not recommend a reef hook until you know how to properly use it. Get training and be sure youre with a group all using hooks. Otherwise you may end up hooking onto corals or inadequate substrate, losing buddies who didnt hook, or worse case, hooking in too strong of current and getting stuck.
I would definitely recommend lob. This allows you to start off easy and work your way up to more serious diving. Your dm will get to know you better and give advice along the way.