I have a question, once I manage to master the coin concealments in 'Modern Coin Magic by JB Bobo', how hard is it then to translate (turn into) these into actual vanishes?

Concealments, transfers and acquiements, then vanishes. That covers the mechanics, still need some acting to make an effect.

The short answer is: "very".
The mechanics of making a coin disappear are simple: you either pretend to put it in one hand and don't, or you pretend to take it and don't.

The problem is that when you do either of these things and a coin seems to disappear it's human nature to look at your other hand. After all, when you lose something don't you start looking for it in the last place you know for certain that it was?

That's why simply making a coin disappear is a bad idea unless you ditch the coin before you reveal that it's gone. Besides, simply making a coin vanish is a pretty poor trick compared to other tricks that are easier to put across.

So instead of rushing to perform a coin trick that will teach your friends to ask to see what's in "that" hand, resist the temptation and study Bobo's until you have learned some of the stuff in the tricks and routines section. A good first trick to learn is Gadabout Coins. It will allow you to use your skills in a way that is baffling without the "danger" of being dirty when they want to ask the question you don't want to answer.