I can’t say how you should spend your money.
One thing I will say is that if you remain following this hobby, you will be using some things no matter what.
It may make sense to get a better charger that you won’t outgrow too soon, or won’t break right away.
Same with something like an r/c transmitter. You will rapidly outgrow a cheap one… get something that will last.
When I got my first real transmitter it was ridiculously too good for the aircraft I was flying and my flying skills. And about 3 times what I wanted to spend. 
But as an investment it paid off. I still use it and have not come too close to outgrowing it.
And I’ve had this really nice transmitter to use since the beginning.
a7