Hi Ashe,
Welcome to the forum, and hopefully soon welcome on the bike as well!
Have you been riding any motorised 2-wheeler before?
What bike did you take your license on?
These questions might help to give a better advise with regards to selection of first-time bike.
Personally I don't have a problem with the throttle. I'm not denying others might have - but I reckon it is to some extend, down to the rider as well - we are afterall different
For the MT-09 as a first bike. Yeah, it will be a good one for some, if you know the respect of speed and being sensible - you have the age to be so at least, which is in your favour.
The bike will only lift the front wheel, if you ask it to do so - B-mode will definitely help here - just be aware, that you will need to put into B-mode, every time you start the bike.
After the running in-period, you can choose to ride in a higher gear - specially in heavy traffic through town, it will also keep the economy good, but will give you a better feeling with the bike, and because you're riding in the higher gear, the said "issue" with a sensitive throttle will be nearly nothing to feel.
Within a few months you have learned the bike to know much better, and you can try more.
The price taken into consideration, the weight and its flexibility, I would say it can be a good one for a first time starter.
There can be an issue with insurance for some - I am not familiar with the insurance market in Portugal, but if it was here in Britain, you'd probably pay a Ferrari a month.....

But this is greedy Blighty!
Maybe the bike is also available with a restriction kit (25kw) available from your dealer - usually it is very simple to add, and maybe Yamaha even give it for free, as it can be done electronically - check with your dealer. Just make sure it can be removed very easily, with out big costs or swap of bike for your expense.