Is this the right choice?

I don't know whether if this is the right choice for me.
I know that it'll benefit me and part of me do feel like going but another part of me told me not to.
I hope i won't be sacrificing my studies for it. I don't want to repeat the mistakes made in the past. However, there will be lots of preparation to do and lots of committment is needed. Will i be able to cope?
What about my common test? Will i have enough time for my revision?
Probably this would be my last event or at least my last major event.
I've been thinking whether this is the right path for me and how long would i stay on/how long can i stay on?
Maybe it's just not the right place for me and i should leave silently?
I do enjoy some part of it but i guess i should look at the big picture. I like the interaction with the cadets, getting to know them better and being able to guide them to become a better person. However, there are people that i can't work with. I hate the politics but i think no matter where we go, we still have to face it.
It's really challenging to cope with all the different things (HQ, Unit, Studies, Friends, Family and etc). All i need is more TIME!
But still....I'm glad that i could get to experience all these. It's one of the most important part of my life.
Though i've gone through quite a fair bit already but there is of course, more to go. Let me think about it again when my mind is clear, when i'm calm enough.
I don't want to disappoint those seniors who have groomed me and helped me along the way but sometimes we've to be selfish in order to make the right decisions for ourselves. We can't always think about what people will think and how they will feel cause usually we won't be happy when we keep follow suit to what people want and expect from us.
They won't die or lose much without me around right? There won't be any difference to them but it'll be a huge difference for me.

For now, i really need to work on my time management. Nothing is impossible right? Jiayou edna! you can do it as long as you don't procastinate any further, be more focused and complete all your tasks way before the dateline. Don't leave everything to the very last minute and stress over it.